bigcountry

Well, I guess the guys at Chrony is correct. I moved the Chrony back to 15 feet past the muzzle. I shot my 7mmSTW loads and gained another 100fps velocity. I tried out some RL25 loads and got good velocity but accuracy was 1.1MOA average with 5-10MPH winds.

7mmSTW
160gr Accubond
74gr 7828
2990fps Average

160gr Accubond
80gr RL25
3120fps Average

48thguns

I sure wished I could help you as I am at mid stream myself on the darn thing. My rifle is a Sako 75 with a 25 inch, I think, barrel. I finally got it over 3300 with that 140gr but they were all over the place. I have a hunch...just a hunch mind you that it may perform better with the 150/160gr bullets. I did manage a 1/2 inch group with IMR4831at 3075 MV and gave up prior to deer season. I will not waste anymore powder in a rifle that underperforms a 7mag and I will not blow myself up stretching the evelope. My next testing will be with the 150 and 160gr bullet....all my buddies say it will shoot the 160's at 3300'/sec with no pressure problems...We'll see. regards, Rick.

bigcountry

Actually I am pretty happy with 3150fps with 160gr bullet. I can live with that. I just couldn't live with 2900fps. I would just rechamber to a rem mag if thats the case. I didn't have any pressure signs with 80gr of RL25 but think I am stopping there.

trailer

Would this be for magnums only or would it apply for regular cartridges also ?...

mossy33oak

yeah Im glad bigcountry finally got that thing to hit 3100 fps. I think he was ready to whoop my butt when he got it outta the case and I said "Oh so you're gonna shoot the turtle now huh??"

nunya

bigcountry

He didn't, I got a STW to go 3100fps

nunya

my nosler manual lists 85 gr aa8700start 3058 89 max 3184 for 7mmstw the latter 98% case cap

mossy33oak

it was a JOKE!!! I do what I can to get the bigboy rattled!

CAJUNBOWHNTR

hey BChave you chronyed a 139 or 140 garin bullet in your STW?.I'm thinking of building one on an older sako action.

Thanks,
CB