.308 win F/TR chamber

[cmillard]

What brass you running?

 

[CNC-Dude]

Lapua large primer. CCI benchrest primers...

 

[cmillard]

Nice

 

[Alantra]

In MY experience (emphasized because people will argue about this until the cows come home) - The spot where the velocity flattens out or dips a little bit, is the spot I want to be, and I tune around that. I don't shoot BR. I shoot F-Class so take that for what it's worth. In my first image, 44.5 is the load I landed on and used for a very long time across many barrels.

Why does velocity go down? Call it a flat spot, call it positive compensation, I don't know. Tide goes in, tide goes out, can't explain that. I just know it is useful information for ME.

Why are people at my range thinking I’m nuts to put 44 grains of n150 with 200.20x in alpha srp brass with br4 primers. I’m working my way up from 41.4 grains. And I’m seated .005s from the lands. Based on what I ran on GRT, I’m just under max pressure. Am I missing something? Just want to make sure I’m safe. First time loading 200s. I have an FTR chamber.

 

[andrew l]

What is your barrel length? If close to 30" with a 2013 team reamer, and the velocity with the 20x at 44 grains of N150 is under 2700 fps you aren't nuts.

 

[Alantra]

What is your barrel length? If close to 30" with a 2013 team reamer, and the velocity with the 20x at 44 grains of N150 is under 2700 fps you aren't nuts.

32” Brux 6 groove. Haven't shot the loads yet. They’re concerned I’m either going to damage my action or hurt myself.

 

[NZ_Fclass]

Found the problem.....my LnL Guage was messed up....got it squared away the sliding rod wasn't in all the way and it was causing my loads to be loaded way long after measuring.....got it fixed. Those bergers will actually kiss the lands at 3.160 so they were being jammed a lot before!

Fo yourself a big favour. Sell the stupid LnL gauge and use the Wheeler method - stripped bolt etc. It has saved me a lot of projectiles and powder!