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I'm not an expert, but maybe this esoteric phenomenon exists. I'll be on the lookout for it.
Replacement of SR 4756?
- Thread starter 38SPL HV
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Rogeronimo
Member
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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scooter123
Member
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.
cowboy4evr
Member
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 .
stephenking
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Ok I'm just going to throw this out there I need some sr-4756 there is a load for my 10 ga with a fps of 1500 that I want bad is there anyone who would be willing to part with some you can text me 541-281-7727 thanks in advance
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Oh, and I did get those 38 and 357 load trials in, plus more 9mm.
SR4756 does do well in the 38 and better in the 357 magnum
at the top end loads.
It fills the 9mm case about the same as Unique but being slower
it does not really do well, compared to other powders and I think
that Unique is a little better in the fps department.
The newer BE-86 can match Unique in the medium weight bullets.....
and being a ball type, more can be added to the little 9mm case
being almost the same burn rate, and come out with higher fps
than Unique with the heavy 147gr bullets, I have tested.
Good luck finding a new powder.
SR4756 does do well in the 38 and better in the 357 magnum
at the top end loads.
It fills the 9mm case about the same as Unique but being slower
it does not really do well, compared to other powders and I think
that Unique is a little better in the fps department.
The newer BE-86 can match Unique in the medium weight bullets.....
and being a ball type, more can be added to the little 9mm case
being almost the same burn rate, and come out with higher fps
than Unique with the heavy 147gr bullets, I have tested.
Good luck finding a new powder.
I got a call from my former doctor(he retired darn it). He wanted to sell most of his reloading stuff because he is going to travel. Went to his house and in all the stuff he had was a pound of PB a pound of 7625 and a pound of 4756(all discontinued of course) Also got two 8 lb kegs of Longshot and 410 along with a can of Red Dot one of Green Dot and a few partial cans of other powders. For some odd reason he had a pound of 4759 too I will use the PB and 7625 the Dots ..and probably even the 410...Longshot is doubtful. The price as they say...was right. He even gave me his duck and goose decoys.
I think the best powder to use in a particular caliber is the one that is listed in the reloading manual I use and is on the shelf in front of me at the store. It is really hard to beat published load data and "In Stock" powder on the shelf.
ArchAngelCD
Moderator, SWCA Member, Absent Comrade
An article in a recent Shooting Times said according to Hodgdon the fairly new W572 will make a good substitute for SR4756.
Since I have 10 lbs or so..there is not replacement powder like the original. Yeah when it is gone it's gone forever but I buy the discontinued powders I do use whenever I see the, I even have a 5lb?? keg of 4756. I used to use it in shotshells for the most part though. PB and 7625 also.
