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Old 05-19-2017, 08:23 PM
38SPL HV 38SPL HV is offline
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Replacement of SR 4756? Replacement of SR 4756? Replacement of SR 4756? Replacement of SR 4756? Replacement of SR 4756?  
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Default Replacement of SR 4756?

Any comparable powders out there particularity the new IMR powders?
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Old 05-19-2017, 08:26 PM
38SPL HV 38SPL HV is offline
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Replacement of SR 4756? Replacement of SR 4756? Replacement of SR 4756? Replacement of SR 4756? Replacement of SR 4756?  
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I meant particularly (darn spell check again)
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Old 05-19-2017, 08:28 PM
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Fill your tank up with the new 86 fuel.........

BE-86 that is.

At least for my 9mm test in a 5" barrel.
A 6" barrel in 38 and 357 is loaded, just need some nice weather.
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Old 05-19-2017, 08:29 PM
kbm6893 kbm6893 is offline
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Pretty new hand loader here so no real answer to your question but I started with SR7625 when the panic hit after Newtown and loaded over 6000 9MM rounds. Metered exactly right every time. But I can't get it anymore so I switched to HP38 which meters well too.

But I would have stuck with 7625 forever. Wish they still made it
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Old 05-20-2017, 11:13 AM
cowboy4evr cowboy4evr is offline
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SR - 4756 is a single base powder , a real favorite of mine for years . The powder line " Nobel Sport - Vectan " are mostly single based as well . The ba-9 is about like Unique so I would think that ba 7.5 would be a real close equivalent to SR-4756 . I have never tried any of their powders but I read good reviews . I might try it someday yet . Their powders are very popular in Europe .
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Old 05-20-2017, 01:47 PM
at_liberty at_liberty is offline
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Quote:
Originally Posted by 38SPL HV View Post
Any comparable powders out there particularity the new IMR powders?
I still have a few pounds of SR4756 but if I had to go with something else, I would want to preserve the way the loads are lofty enough for me to easily enough see the powder before placing a bullet for seating. I would use the Lee VMD table here and multiply it by the number of grains in powder company data for each load of various powders for your cartridge. Unique and American Select should be among those to check, since their VMDs are close or higher than SR4756's relatively high VMD.

SR4756 doesn't always burn completely, even with magnum primers, so it will be a plus to get away from that minor issue.

5.0 gr of BE-86 with 158 SWC is an accurate load for me in 38 Special, which is where I currently use SR4756 the most. I also use it on light loads of 357 Magnum with 125 gr bullets, lead and jacketed. BE-86 works great there too.
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Old 05-20-2017, 03:52 PM
Calliope Calliope is offline
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4756 was my favorite 357 powder, shoulda' hoarded better.
I'm still working on a replacement. Tried Power Pistol, not very bulky, but it works OK. Unique is slightly faster and has good bulk, but does not meter well for me (4756 metered beautifully). I'm looking at Herco, but there's no real advantage in ballistics over Unique.

HS-6 is right there for speed and it meters very well, but the tiny charges and the difficult ignition requires a heavy crimp and mag primers.

I'm hoping the new IMR powders have good bulk and meter well.
Looking at the new burn rate chart, Unequal is slightly slower than Unique/Universal and Blue is slightly faster than Blue Dot, so I'm hoping one of those will fit the bill.
As soon as there's any data for Blue in 357 I'm going to try it.

I'm tempted to experiment with it now, but I no longer have a chrony, so I think I'll wait.
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Old 05-20-2017, 04:37 PM
rockquarry rockquarry is offline
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I've also used 4756, but not in a long time. There is a glut of powders on today's market, far more than we need. If I was serious about finding a powder to replace 4756, I'd do a little homework and select four or five powders to work with; that's a big part of the enjoyment of handloading. At least one of those powders should work very well in duplicating or even exceeding 4756 performance.
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Old 05-20-2017, 08:58 PM
scooter123 scooter123 is offline
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You won't be fond to the price but Vihtavouri 3N37 sits dead even with SR4756 on Western Powders Burn Rate chart. I use 3N37 for 38 special and heavy bullet 9mm loads and can state that it meters wonderfully and shoots cleanly. Accuracy and consistency from shot to shot is also excellent.

I am also a user of SR7625 and stocked up when it was announced it was being discontinued. Once that's gone I'm not sure of what I use for a replacement but Accurate #5 and VV N-330 are two alternates I'm considering. Experience using Accurate #5 for reduced energy 357 Magnums and hotter 45 ACP loads indicates it will work, however I don't know if anything will reproduce the soft recoil impulse of the SR7625.
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Old 05-20-2017, 10:33 PM
Rogeronimo Rogeronimo is offline
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I, too am a fan of the vihtaVuori lineup. They are single base as well, and ignition is flawless with WW primers from my experience.
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Old 05-21-2017, 01:46 AM
Calliope Calliope is offline
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Quote:
Experience using Accurate #5 for reduced energy 357 Magnums and hotter 45 ACP loads indicates it will work, however I don't know if anything will reproduce the soft recoil impulse of the SR7625.
That's one thing HS-6 will do, give soft recoil like 4756.

Just finished loading some 357 with Rainier 125 plated FP over HS-6. Looking forward to a soft shooting load with minimal muzzle blast.

Maybe I should look into 3N37, VV powders are nice to work with, you just don't see them around. N310 is the best 45 auto target powder I've ever used.

Time to do some Googling.
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Old 05-21-2017, 11:13 AM
cowboy4evr cowboy4evr is offline
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I just looked at Vectans burn rate chart . Thet show ba-7.5 straight across from SR 4756 . They listed 3N37 as one notch faster . Hope this helps .
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Old 05-21-2017, 11:57 AM
at_liberty at_liberty is offline
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Quote:
Originally Posted by cowboy4evr View Post
I just looked at Vectans burn rate chart . Thet show ba-7.5 straight across from SR 4756 . They listed 3N37 as one notch faster . Hope this helps .
Good to know, but burn rate is only one attribute to consider. The type of powder and how it measures, its minimum accurate measure, what primer it requires, and especially its VMD are other important factors to consider.
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Old 05-21-2017, 12:39 PM
cowboy4evr cowboy4evr is offline
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The OP asked for a powder that was comparable . Being single based and same burn rate is about as close as one will get . If it was a perfect match in all qualities then it would be 4756 under a different name . But that is not the case here . He asked for a powder " similar " to 4756 . Reloading is not rocket science .
All the loading data/ pertinent info is available at vectons website . Primer info , min- max load data etc .

Last edited by cowboy4evr; 05-21-2017 at 01:13 PM.
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Old 05-21-2017, 04:16 PM
at_liberty at_liberty is offline
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Quote:
Originally Posted by cowboy4evr View Post
The OP asked for a powder that was comparable . Being single based and same burn rate is about as close as one will get . If it was a perfect match in all qualities then it would be 4756 under a different name . But that is not the case here . He asked for a powder " similar " to 4756 . Reloading is not rocket science .
All the loading data/ pertinent info is available at vectons website . Primer info , min- max load data etc .
I am sorry you are offended by being quoted, but burn rate alone would oversimplify, especially on VMD. As long as it measures well enough, I personally wouldn't consider powder type, single-based, etc., as all that relevant until really getting down into details that don't really make much difference, if any, depending on the application.
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Old 05-21-2017, 04:40 PM
Calliope Calliope is offline
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Burn rate can be deceptive.
Power Pistol appeared to be the perfect fit for me, like 4756, it's a notch slower than Unique on the chart, but when I tried it I didn't like it. Forget the tiny charges, the stuff really has a lot of muzzle blast and apparent recoil.
It behaves faster than Unique if you ask me.
Don't want to go to Blue Dot because of the rep of cold weather pressure spikes (here in MN I sometimes shoot below zero) and unpredictable behavior with 357 and 125 grain bullets.
So I'm back to Unique and HS-6.

C'mon IMR, lets have some data for 'Unequal' and 'Blue' in the 357.

I have high hopes for Blue to be my cold weather, magnum-lite powder.

Last edited by Calliope; 05-21-2017 at 04:47 PM.
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Old 05-21-2017, 05:56 PM
cowboy4evr cowboy4evr is offline
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At liberty , I'm not offended . We have different opinions of what is important . Discussion is good . I find burn rate important . I'm not a technical numbers guy , I find the real determining factor is going out and shooting it. if someone doesn't think burn rate and single base vs double base important , then use what works for you . But this is what I use , I keep it simple and it works for me .

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Old 05-21-2017, 06:21 PM
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I do not understand why it really matters and why the issue is brought up so late in the game?
The report of discontinuing this powder started around 2013.

A simple Goggle search shows a gazillion (yes, I counted them) results for "replacement" suggestions.
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Old 05-21-2017, 07:05 PM
rockquarry rockquarry is offline
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Soft recoil impulse...is this something real and fact-based? I'm unfamiliar with the term.
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Old 05-21-2017, 08:10 PM
Calliope Calliope is offline
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Quote:
Originally Posted by rockquarry View Post
Soft recoil impulse...is this something real and fact-based? I'm unfamiliar with the term.
It's the idea that with the same bullet at the same speed, one powder might give less 'felt recoil' than another.

For example, in 357 you can reach 1,000 fps with a 158 JHP using Bullseye or 2400.

Mathematical recoil formulas would have it that the lower charge weight of Bullseye would give less 'free recoil' than the 2400 load.

OTOH many experienced shooters would feel less recoil with the 2400 load because the bullet accelerates more slowly and gradually than it does with Bullseye. 2400 and other slow powders seem to 'shoot softer' for any given speed.

Of course it's all perceived between the ears, so what works for one may not work for another.

Last edited by Calliope; 05-21-2017 at 08:11 PM.
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Old 05-21-2017, 09:14 PM
rockquarry rockquarry is offline
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I'm not an expert, but maybe this esoteric phenomenon exists. I'll be on the lookout for it.
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Old 05-22-2017, 02:54 AM
Rogeronimo Rogeronimo is offline
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Rereading this thread, I'll boast on VV 3N38 in its suitability for the 357 magnum. Not much is published, though Sierra lists rifle loads. I push 140 gn, 158 gn, and 180 gn bullets with outstanding results from a 3" L frame using magnum primers by choice. I only mention that it's single base, as that may produce a lower flame temperature reducing forcing cone and flame cutting issues. My loads exceed what's published, and my primers are quite flat at the end of the day, yet the felt recoil I experience, in itself, would not beckon me to back off one bit. Take this for what it's worth, or not at all, but I have no need for Blue Dot in 357 magnum. Not that it's unsuitable, 3N38 is simply that impressive. Longshot, also in the burn rate ballpark, didn't behave as such, and I moved on.

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Old 05-22-2017, 07:30 AM
scooter123 scooter123 is offline
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Quote:
Originally Posted by rockquarry View Post
Soft recoil impulse...is this something real and fact-based? I'm unfamiliar with the term.
Real, can't be certain but my experience with SR7625 indicates that there is less PERCEIVED recoil with this powder. I started using this to reload 40 S&W and worked up a load that chronographs at the exact same 960 fps with a 180 grain bullet as Federal Champion (the good old red box Walmart special. Shoot the reloads side by side with the Federal and the difference in muzzle flip and felt recoil is noticeable with the SR7625 loads feeling softer. As for why, the only theory that I can come up with is the SR7625 is slower burning and it accelerates the bullet and a lower rate. One thing that supports this theory is that it does produce more visible muzzle flash than the Champion but the muzzle reports sound identical to me.
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Old 05-22-2017, 08:30 AM
cowboy4evr cowboy4evr is offline
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Hodgdon said that SR 7625 and 4756 was too labor intensive to continue production . My sister will only shoot SR 7625 as her 41 magnum load . When I learned it being dropped , I stocked up so she has a life time supply . I grabbed up some 4756 at the same time . I've been looking at some of the powders from Nobel Sport-Vectan and Shooters World .
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