Anyone have a SR4756 M1 Carbine load?

[R-Tex]

My Lyman's 47th edition shows an M1 Carbine load of 6.5 to 7.3 gr of SR4576 under a 110 gr Sierra jacketed RN. Anyone have any experience with this load? The manual shows a MV of only 1509 fps, which is a good 350+ fps slower than the other loads.

I was wondering if the 4756 would be any good for plinking loads since I'm about to have a lot of it.

TIA,

 

[R-Tex]

My Lyman's 47th edition shows an M1 Carbine load of 6.5 to 7.3 gr of SR4576 under a 110 gr Sierra jacketed RN. Anyone have any experience with this load? The manual shows a MV of only 1509 fps, which is a good 350+ fps slower than the other loads.

I was wondering if the 4756 would be any good for plinking loads since I'm about to have a lot of it.

TIA,

 

[Skip Sackett]

I think you would be better served using a powder further down on the burn rate chart. 2400-Lil' Gun area.

FWIW

 

[R-Tex]

Thanks, Skip. I think you're most likely right.

Four pounds of 2400 is also on its way here in the same shipment as the 4756!

Also, Ken Waters in his book "Pet Loads" really likes 13.0 grains of 110 for the Carbine. MV is said to be 1968 fps.

1500 fps just SOUNDS too slow.

Thanks again,

 

[Skip Sackett]

I have a powder that was designed for the 30 Carbine. Mine is pulldown that loads at 13.5gr for 110gr bullet. It is called WC820.

Here is a link that has some "stuff" about that powder. It used to be on the gibrass.com website but is not there now.
http://www.castbullet.com/reload/wc820.htm

 

[R-Tex]

That's an interesting writeup, Skip.

I appreciate your your posting the link!

 

[Paul5388]

Rick,

Here's some data from Speer #8.

As you can see, H110 really isn't a wonder powder. 2400 will do about as well and H4227 isn't far behind it. You'll also notice the SR 4756 loads are a little stouter than the data you have.

Obviously, your results will depend on the gun you're using and its barrel length.

BTW, the 2400 load is 20 fps faster (2131 fps) than 15.5 gr of H110 (2108 fps) out of a rifle.

 

[R-Tex]

Thanks, Paul5388 -

That's MOST interesting information!

 

[Paul5388]

Rick,

When I shoot SR 4756 in .357 with a 125 gr bullet, the velocity "grows" from 1575 fps out of a 6" barrel to 2080 fps in a 22" Handi rifle (using 1982 vintage powder). If I switch to 2004 vintage powder, the 6" velocity drops 25 fps, but the rifle only drops 5 fps.

Using .357 Max brass cut down to 1.50" (the actual chamber length) 18.5 gr of 2400 only gains 95 fps over the SR 4756 loads in standard .357 brass.

 

[Rule3]

As the info is listed for pistol,Would it be acceptable to use the load data for Unique in a M1 carbine? I have been using H110 and/or 2400.

 

[Paul5388]

I guess you would have to figure out if the M1 Carbine is as strong as a Blackhawk. Of course, they used more H110 in the Carbine than they used in the Blackhawk, so I don't think strength has anything to do with the loads in the two types.

 

[Rule3]

I would "guess" a Blackhawk is stronger. The Speer data does not list any pressure only fps. The Unique is less velocity. Seems like I would use a lot less powder with Unique as long as it cycles the rifle.

 

[Paul5388]

If you can use more H110 in the Carbine than you can in the Blackhawk, the Carbine is probably stronger, IMO.

If it was mine, I would try Unique, but I'd start low and work it up. However, that's a matter for you to decide.

 

[Hook686]

Some folks get best results from IMR4227

http://hunting.about.com/od/guns/l/aastruger30bh.htm

 

[Rule3]

Originally posted by Paul5388:
If you can use more H110 in the Carbine than you can in the Blackhawk, the Carbine is probably stronger, IMO.

If it was mine, I would try Unique, but I'd start low and work it up. However, that's a matter for you to decide.

Using the Unique is almost half as much powder than using H110 but a bit less velocity. Is this due to it's faster burning??

 

[Bruce51]

I have tried Unique in the .30 carbine in a Blackhawk. The 7.5gr load listed in number 8 is probably the highest pressure load I have ever fired. The load was extremely loud, the primers were extremely flattened and the cases were stuck hard in the cylinder.I would recommend staying away from that load. Thank Ruger that the Blackhawk has lots of steel where it counts. Bruce

 

[Rule3]

Originally posted by Bruce Lee M:
I have tried Unique in the .30 carbine in a Blackhawk. The 7.5gr load listed in number 8 is probably the highest pressure load I have ever fired. The load was extremely loud, the primers were extremely flattened and the cases were stuck hard in the cylinder.I would recommend staying away from that load. Thank Ruger that the Blackhawk has lots of steel where it counts. Bruce

Sorry, not trying to hijack this thread. You think the Unique load is to much for a new carbine(rifle)?

 

[Bruce51]

Just checking some data that I chronographed years ago. H110 14grs 110JSP M1 carbine 1893fps
H110 14grs 110JSP Blackhawk 1229fps

110JSP Bluedot 8.5grs Blackhawk 1250FPS
Factory 1337FPS
Unique 5.5grs 1022FPS
What is interesting is a few years later I chronographed the Bluedot load again. The velocity dropped lower by 100fps. Go figure. It has been said it can be inconsistant.Bruce

 

[Bruce51]

OCD1 I think you are risking blown primers and stuck cases.I only fired two rounds and I knew they were over the top. If they were to stick in the carbine you might tear a case head off.
If I wanted to use Unique I would start at 6.5 grains and work up to less than 7.5. You will no longer find this load listed in the books. They now stick to 5.5grs. BTW the 8.5gr BD load does function the carbine perfectly. In a carbine it is supposed to give 1620fps. Any load which exceeds 1500fps will most likely cycle the gun. Bruce

 

[Rule3]

Originally posted by Bruce Lee M:
OCD1 I think you are risking blown primers and stuck cases.I only fired two rounds and I knew they were over the top. If they were to stick in the carbine you might tear a case head off.
If I wanted to use Unique I would start at 6.5 grains and work up to less than 7.5. You will no longer find this load listed in the books. They now stick to 5.5grs. BTW the 8.5gr BD load does function the carbine perfectly. In a carbine it is supposed to give 1620fps. Any load which exceeds 1500fps will most likely cycle the gun. Bruce

It's not that a really want to use Unique, just that I saw it in the load data and figured i could use half as much powder. Without knowing the pressures I do not understand how the Unique can be a "Hotter" load than what I have been using the H110 and 2400 magnum powders??