Has anyone else noticed that their loads using SR-4756 tend to place a tight group, but at 50 yards are approximately 7 inches lower than a load using IMR-3031 or IMR-4350 (or other similar powder)? I loaded rounds using SR-4756 powder in .30 WCF and .30-06, and both placed shots 7 inches lower than other of my reloads.
SR-4756 powder
- Thread starter orpington
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Potatohead
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Cant really help you with that but I will sorely miss 4756 when they cut it off.
Peter M. Eick
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Yes, SR-4756 has been anounced as being retired at the end of the year. This was via emails, statements from company reps and I believe a notice put on their web site. Basically what is available for 4756 is either packed and in the pipeline or on the shelves. If you like it get what you can of it now. I have 6 8 lb jugs of it since I use it a lot.
Do some searches on the web and you can verify this and find some more details. PB, sr4756, sr4759 and a few others are all being cut this year.
Do some searches on the web and you can verify this and find some more details. PB, sr4756, sr4759 and a few others are all being cut this year.
ArchAngelCD
Member.
Yes, like said above all 3 SR powders along with PB will be discontinued at the end of 2014. Normally when a powder is discontinued you can see it on the shelves for several years but because of the current powder, or lack of powder environment when it's gone I'm fairly sure it will really be gone.
Like asked above, are you really using SR-4756 in rifle cartridges or did you mean SR-4759? IMO 4756 should not be used in rifle applications but 4759 is just fine since that's what it's meant to do. SR-4759 is for loading very light rifle loads usually with lead bullets while SR-4756 is not.
Like asked above, are you really using SR-4756 in rifle cartridges or did you mean SR-4759? IMO 4756 should not be used in rifle applications but 4759 is just fine since that's what it's meant to do. SR-4759 is for loading very light rifle loads usually with lead bullets while SR-4756 is not.
What load? What projectile? We really can't answer more without this information.
The Lyman Cast Bullet Handbook 4th Edition shows SR 4756 loads for 170 gr cast bullets in both .30-30 and .30-06. However, the 4756 loads are going anywhere between 300 and 800 fps slower than 3031 loads in the same book. This would account for groups 7 inches lower on the paper than other powders.
The Lyman Cast Bullet Handbook 4th Edition shows SR 4756 loads for 170 gr cast bullets in both .30-30 and .30-06. However, the 4756 loads are going anywhere between 300 and 800 fps slower than 3031 loads in the same book. This would account for groups 7 inches lower on the paper than other powders.
I am using SR-4756, and these are loads, as published by Lyman. I used 13 grains behind a 311041 cast bullet in my .30-06, and whatever the published low-end load is for .30-30, or close to the low end load, as published in the Lyman reloading manual for use behind cast bullet 311041, a 173 grain bullet. It has been awhile since I loaded for my .30 WCF, but I think I used 8.0 grains. If velocity is lesser, as mentioned above, it could explain the significant drop.
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