300BlkTalk

Signed up- thanks for the opportunity.

Do not size them down to .309". Try leaving them at the size they come out of the oven at. I have shot the Lee 230 out of a 10 twist and at 25 yards they are definitely stable. I have not had a chance to tr them at 100 yards but bullets cast from my 240E mold, which weigh 247 grains, are stabl...

Were you using the same powder as the previous rounds fired? Wondering that if you were getting 1093 with a jacketed round that your current cast rounds are going supersonic now with maybe that one round being subsonic - that would account for a drop outside the normal group but not so much for a k...

Thanks for the responses everyone- keep them coming if you have suggestions.

hunter2 wrote:Might have been a low powder charge. How fast are you running them?

Good idea- I haven't run any through a chrony yet but it sounded subsonic and the same charge gets me 1093fps with a 220SMK.

Now if only I could get some help from the weather so I could set up my chronograph...

Was the barrel cleaned prior to shooting? What sort of rounds were shot before testing these loads? Barrel was very clean because I was checking for PC residue to confirm that my coating process was working. No evidence of the PC to date, btw. Prior to the rounds I described above I fired the other...

May have been a void in the boolit. Not much you can do but clean up your casting practices. If you are using a bottom pour pot keep the mold the same distance from the spout, pre heat your mold with a hotplate, and use a PID or similar controller to keep your alloy temperature consistent. If you a...

May have been a void in the boolit. Not much you can do but clean up your casting practices. If you are using a bottom pour pot keep the mold the same distance from the spout, pre heat your mold with a hotplate, and use a PID or similar controller to keep your alloy temperature consistent. If you a...

Recently decided to give casting and PC a whirl for subsonic BLK projectiles. After a few sessions I had some boolits that looked pretty good - judged by surface and base inspection. I also separated them by weight before the PC process. 228gr was the weight of the best looking boolits and I used a ...

I'm interested in a 10.5" barrel. Please add me to the list also