Thread: 338br/whisper load development

Start your load high, and go down in weight.
Look up load data for the 8.6 back out and that will also give you an idea.
Just as a hint.
I had a load of 9 grain of n120 in my blackout behind a 240 SMk. Which was working fine.
I sampled some subsonic copper projectiles from Aussie , starting with 10 gr. And the first round I got the bullet stuck inside barrel.
I maga Ed to push it out with a cleaning rod.
I changed my load and went slightly higher in powder weight. The next few rounds went out good. But on the 5 or 6th round got stuck at the end of the barrel.
Than one was easier to get out. But that gives you an idea of what could happen if you don’t have enough powder in your case.