338 Lapua reloading with 250 Berger and H1000, question on expected speed.

[dan belisle]

My 338 Lapua (a Sako) would push 250's to about 2960. This was with Retumbo or RL25. It wasnt much faster than my 340 Wby though, maybe 20 fps. - dan

 

[BAKPAKR]

My 338 Lapua (a Sako) would push 250's to about 2960. This was with Retumbo or RL25. It wasnt much faster than my 340 Wby though, maybe 20 fps. - dan

I have a Sako 338 LM and I am right where you are with Retumbo and 250 gr Hornady BTHPs.

 

[RUFFIAN R - NY]

I'll take accuracy any day over speed !!!! Am shooting a Sako 42 27in w/ a brake in 338LM over -for a while now.

 

[ARlife4me]

I pressured out early with mag Pro speeds were very low barely tapped an 8 pound keg ,do you need one?

I have plenty, but thanks! I use it in 243win.

 

[jessej]

My lapua loves 2800ish fps.
250s with H1000 and 300s with retumbo.
2840 fps. 26" barrel.
250s are tighter at 1000 but I stuck with the 300s. No pressure signs on either.
300 grain target.

 

[jessej]

I am tempted to look for a higher node with the 250s. I feel like close to 3000 wouldn't be a problem.

 

[pawater]

I had 3k in my Lapua with 250 berger and 93 grains h1k. 27" Bartlein. Under 1/2 moa Obviously work up to that.

 

[Idaho Hunter1]

As an aside, I loaded my 338LM to just barely short of Mag length. And went elk hunting. Was fortunate enough to get an animal and when I unloaded the Mag after 1 shot, all of the tips (accubond 300gr) were deformed from the recoil. Also the seating depth was deeper than the recipe. Not sure what that would have done to a follow up shot but it was something I never considered during the load development. When I checked for functionality I simply loaded and ejected out of the mag without firing.

If you are going to retry developing a load, might consider examining if you are experiencing this issue.

Best of luck, and I get about 2850FPS with RL33 and 300 gr AB.

 

[dan belisle]

A crimp will help with that. - dan

 

[amyjune]

My Rem 700 in .338 Lapua Mag using 300gr SMK over 92 gr of Retumbo gets 2800fps.

 

[Cbass1019]

i get 3030 fps with 250s with 98 grains of N570 half MOA load, no psi with Peterson brass. Savage target magnum 26"

 

[ARlife4me]

If you don't have any n570, then lrt, magnum, retumbo will get you top velocity for the 300's. rl25, 7828ssc and 869 could be a 2nd choice? Some are more temp stable than 869.

 

[WEATHERBY460]

New 28" Barrel, with about 30 rounds. 91.5 of H1000, and I see a light mark around primer. Dropped back to 91.0 of H1000. Looks promising for a group size, but only getting 2850 fps. I have Retumbo. I will try that next weekend.

 

[RUFFIAN R - NY]

Been using VVN560 / RL19 & 22, Was not too crazy over Retumbo- am shooting for accuracy and not velocity- just got my gun back from smith with a new 29+ inch bbl was shooting a 26 inch that was shot out. Will stay with my present powders till I get to the range and clock my new bbl.
Good luck with Retumbo !!