realistic velocities for .223 88 eld?

[T28w]

Book max is over 23 I believe at a short coal

 

[Packmansion]

Book max is over 23 I believe at a short coal

What? Can you share that load data? Hornady says 21.1 for h4895 and velocity of 2550...

 

[wind gypsy]

What? Can you share that load data? Hornady says 21.1 for h4895 and velocity of 2550...

Not sure what data T28w is referring to. I assume the Hornady data is based upon 54k PSI and a SAAMI chamber? Significantly different from a longer freebore and not limiting oneself to 54k PSI obviously but I bet those loads got significantly above 62k PSI too!

 

[T28w]

What? Can you share that load data? Hornady says 21.1 for h4895 and velocity of 2550...

I should have put it in my previous post about the 77s

 

[T28w]

It was in response more to the question of why even do a ladder above book max. Well book max at saami is a reference if you are not using saami specs.
I’d want to know I how close to pressure signs I am if running a hot load, so yeah I’d do a ladder and see where I hit pressure, then back down a safe margin.
When I was looking g for info on a load for 77 tmk and 8208, very similar to h4895, every load data I saw for a bolt gun not restricted to a coal was over book max. I did a ladder and never hit pressure from what I remember and settled on a load slightly over book max.

 

[Packmansion]

Not sure what data T28w is referring to. I assume the Hornady data is based upon 54k PSI and a SAAMI chamber? Significantly different from a longer freebore and not limiting oneself to 54k PSI obviously but I bet those loads got significantly above 62k PSI too!

Hornady data is for 60k. They state that the 5.56 nato is rated to 60 even though it isn't lol.

 

[mpwolf]

the 88 eld is 2.465 COAL, so certainly not your usual Tikka throat/mag confines over all length. Even so, these loads are obviously way over pressure. I knew I was goin over book max, and to be honest, I expected to see more visible pressure signs on the brass. I probably should have stopped earlier, but curiosity got the better of me. I have done lots of load work ups over the years, but never with a small bolt face Tikka, and I'm very impressed by how it handled the pressure. Rest assured, I'll back off and load to sane levels.

 

[T28w]

At what point were you compressing loads?

 

[mpwolf]

At what point were you compressing loads?

I'm not sure. Will check when I go to load the next ones.

 

[Packmansion]

I saw on ultimate reloaded they took a 308 win in a bat machine action up to like 80 or 90k no pressure signs. I think they were getting 300 prc velocities.