Thread: Monolithic copper hollowpoints

Turns out that when an engineering firm has a CNC lathe and most of its staff are hunters, eventually someone starts designing solid copper bullets for their 300blk.

Ours pictured next to a Peregrine one, I was finding the cup of the seating die was breaking the three pre-defined petals of the bullet, so I designed a seating stem that pushes against the inside of the metplat.

I love it. Have you tried them out yet?

I have been playing around with the same idea, but in 338.

What insert do you use for copper? I am getting mixed results with aluminum inserts and am contemplating getting some PCD to try.

very clever indeed

Originally Posted by SixtyTen

I love it. Have you tried them out yet?

I have been playing around with the same idea, but in 338.

What insert do you use for copper? I am getting mixed results with aluminum inserts and am contemplating getting some PCD to try.

I've been loading them for the boss's 300BLK, he says they shoot well but I want to try a few in my 308. I think the copper bar he used was 10mm, so I also want to convince him to let me make some .338 ones.

I think the copper he's using is pretty pure and soft, so we've used similar ribs to the Peregrine ones to change the contact area.

Look great.look forward to hearing the terminal results.

Have you seen the new Barnes bore rider long range projectiles?
An interesting concept:
https://www.youtube.com/watch?v=hGMqyi5gVQw

Coolant concentration can be quite important. Higher is better.