Just ordered some 138gr. Hammer HHT for my .308 Win

[Eric H]

43.0 grains yielded 2691 fps. 44.0 grains yielded 2741 with an ejector swipe and sticky bolt lift. This was out a 1:11 20" Tikka CTR. I was hoping for something North of 2800 with that barrel. I did use a Lee factory crimp die. Wondering if I should try it without, but I always read on here how folks like to crimp their Hammer loads…

Sorry OP, not trying to hijack. Perhaps some good information you could use here.

I think that crimp is causing the quick pressure.
OP, let us know how that works for you. Noticed on the Hammer Reloading page the TAC was on the list but not VARGET.

 

[RockyMtnMT]

I'm gonna say try without the crimp and see what happens. It's the phantom pressure without velocity. Could be too much burn in the chamber and not enough down the tube. Could be one of those slow rifles. Could be too much space in the chamber causing bolt thrust. Could be brass still has case lube on it. Could be too hot of a primer.

 

[RockyMtnMT]

I would say start benchmark at 43gr with the 138gr HHT's.

 

[jlarose85]

I would say start benchmark at 43gr with the 138gr HHT's.

Appreciate it sir! I'll give it a shot and report back with my results.

 

[FireFlyFishing]

I'm gonna say try without the crimp and see what happens. It's the phantom pressure without velocity. Could be too much burn in the chamber and not enough down the tube. Could be one of those slow rifles. Could be too much space in the chamber causing bolt thrust. Could be brass still has case lube on it. Could be too hot of a primer.

Tried without a crimp today and had no pressure signs with all my loads. Highest velocity was 2851.

 

[Eric H]

Tried without a crimp today and had no pressure signs with all my loads. Highest velocity was 2851.

How were your groupings?

 

[FireFlyFishing]

How were your groupings?

Like 5/8"!

 

[SouthLoganCountyShooter]

Tac. I'm running 124hh. 46g tac lupua srb 3160fps sub 1/2moa in my gen2. Ran up to 47g of varget. 45 5 and up was compressed. 47g varget only got 2936fps.

 

[Eric H]

Tac. I'm running 124hh. 46g tac lupua srb 3160fps sub 1/2moa in my gen2. Ran up to 47g of varget. 45 5 and up was compressed. 47g varget only got 2936fps.

What twist barrel?

 

[SouthLoganCountyShooter]

In my tikka and savage storm with 47 tac lrp 3250fps. But hit pressure in ruger gen 2 at 46.5 Almost 3200fps. With lupua srp brass hard bolt sticky case. 46 no pressure.
That's with the 124hh.

 

[SouthLoganCountyShooter]

What twist barrel?

1/10 ruger gen2
Using different brass but running same bullet in other 308win. 3 of them 1/10 one is 1/11.
Also running that bullet in a 1/9 30nos at almost 3700fps.

 

[Eric H]

1/10 ruger gen2
Using different brass but running same bullet in other 308win. 3 of them 1/10 one is 1/11.
Also running that bullet in a 1/9 30nos at almost 3700fps.

Y'all gonna make me buy them there bullets.

 

[SouthLoganCountyShooter]

Y'all gonna make me buy them there bullets.

 

[Eric H]

Trigger pulled.