338 lap 2650 300 gr Sierra HELP!

[Lowpull]

338 lap
Lapua brass
300 gr sierra
Federal 215 primers.
AI AW 26 barrel

i get 2650 velocity with 88 gr retumbo
i get 2650 +_ with 93 gr retumbo
is it burn rate and how do i fix it?
Please PM me or email thanks for the help it has got me stumped
NOT showing any over pressure signs.

Could use some knowledge here i am stumped.
Thanks in advance

 

[ChrisGarrett]

Re: 338 lap 2650 300 gr Sierra HELP!

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lowpull</div><div class="ubbcode-body">338 lap
Lapua brass
300 gr sierra
Federal 215 primers.
AI AW 26 barrel

i get 2650 velocity with 88 gr retumbo
i get 2650 +_ with 93 gr retumbo
is it burn rate and how do i fix it?
Please PM me or email thanks for the help it has got me stumped
NOT showing any over pressure signs.

Could use some knowledge here i am stumped.
Thanks in advance </div></div>

I'm a 1:12" shooter, so I stay away from the 300s, but early on, I bought some components and 100 loaded rounds with mollied 300gr SMKs, 94.5 grs of Retumbo, new Lapua brass and CCI 34s from a fellow who shot at Raton in NM, out to 1600+ yds. This was his pet load for an AR-30.

2700-2750 fps, depending on barrel length/bore, should be doable.

Chris