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Old October 16th, 2020, 08:10 PM #41
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My experience is that you can get better accuracy with 120/130 grain jacketed bullets. The thing is, they cost more too. Using lead bullets may open up your groups but it makes for more trigger time.
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Old October 16th, 2020, 08:34 PM #42
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My experience is that you can get better accuracy with 120/130 grain jacketed bullets. The thing is, they cost more too. Using lead bullets may open up your groups but it makes for more trigger time.
For sure, I loaded up a bunch of cast loads after hearing that satisfying ping on a 6" steel target at 100 yards at a standing position. I'm curious how soft of a lead alloy I can get away with. I am currently running water quenched lyman #2 alloy with these casts.

I got a hold of range scrap alloy with BHN of 9-10 for the wonderful price of free. I made a bit of powder coated and gas checked bullets to load up. Started off with 10 and see how they fly...probably not that great.
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Old October 16th, 2020, 10:32 PM #43
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The only problem I have found with lead that is too soft is the violent transition from magazine to chamber. Softer lead, even if PC'd tends to get damage of one type or the other as it goes into the chamber. Other than that, I have shot soft lead PC's in my 30-06 bolt gun to 2600FPS with no issues and excellent accuracy.
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Old October 17th, 2020, 09:11 AM #44
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The only problem I have found with lead that is too soft is the violent transition from magazine to chamber. Softer lead, even if PC'd tends to get damage of one type or the other as it goes into the chamber. Other than that, I have shot soft lead PC's in my 30-06 bolt gun to 2600FPS with no issues and excellent accuracy.
Good to know, Ill take the same round and run it out of a 7.62x39 bolt action and see how that goes.
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Old October 17th, 2020, 04:51 PM #45
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I settled with 3-5 moa pinging steel at 100yd using imr4227, powdercoated, sized 309/160 grain GC lee cast, out of a 7.5" bear creek arsenal upper.

Definitely room for improvement, but it's good enough for general plinking ammo at the range.
I should have clarified that I meant subsonic heavy bullets.

I'm really starting to think that something like a 350 legend would be better for subsonic AR15 stuff.
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Old October 17th, 2020, 10:42 PM #46
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I should have clarified that I meant subsonic heavy bullets.

I'm really starting to think that something like a 350 legend would be better for subsonic AR15 stuff.
I can't really speak for subsonic casts just yet. During my first run, i was using a terribly undersized Lee 309/230 cast bullet without a GC.

Apart from the noticeable gas cutting and terrible design of that bullet (maybe i just had a lemon of a mold), I had a moment where I was fairly hitting the 6" steel target on a bench rest position.

I winded up breaking the mold trying to make it into a plain based bullet without lube grooves. I have a replacement NOE 311/225 PB one on the way and will get back to making subsonics again.
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Old October 17th, 2020, 10:45 PM #47
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Tested out those range scrap 309/160s. Pings a 6" steel target great at 100yards and chronos around ~1400 fps. For free/salvaged lead casts with a gas check/powder coat investment, I can't complain.
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