7 stw group

[mikea5232]

I tried it at 600 this evening. only 3 shots fired then ran out of daylight. I don't shoot very often at that distance but I wanted to try. 120g barnes ttsx.

 

[mikea5232]

I took my time, set up wind flags and that was my best 3 shot group. My 5 shot groups averaged 2". Some a little bigger and some smaller. With some more practice and a little more calm evening,I can maybe do a little better. This was at 600yrds again.

 

[6point5x284]

Nice shooting! What velocity are you getting in a 120 grain bullet? That has to be moving! Probably an awesome antelope round.

 

[mikea5232]

Thanks! I'm guessing 3850, I haven't shot it through the chrony. 1g more powder gets me 3930-3945. I shot a load that was 2 grains less and I was getting 4-5"groups this evening.

 

[Lefty7mmstw]

the last time I chrono'd 120's from a 7stw they were doing 3600 fps from a 26" bbl Sendero... that was a full throttle dose of 7828 (80gr.?), a 120 sierra, and a 215... ymmv but it's taken me 100 grains+ powder in a 7rum to break 4,000 fps with a 120 in 7mm... I've gone to 140's at 3400 fps for moderate range work

 

[mikea5232]

I'm shooting R22 in a rem sendero, winchester factory 7stw brass, fed 215 primer. I've got some nosler 140s in the mail. Going to give them a try. 7828 shoots awesome in my gun as well. Not as fast as r22 in my rifle.

 

[Lefty7mmstw]

I'm shooting R22 in a rem sendero, winchester factory 7stw brass, fed 215 primer. I've got some nosler 140s in the mail. Going to give them a try. 7828 shoots awesome in my gun as well. Not as fast as r22 in my rifle.

I've gone with rl25 and 140 AB's/bt's for 12 years now with my 7stw's... rl22 will work about as well...

 

[mikea5232]

The ones I have coming are the nosler 140 c/t bullets. I'll try r#25 if I can't get r22 or 7828 to work to my standards.

 

[Lefty7mmstw]

I went with rl25 as it was delivering the same velocity with about 8K psi less peak pressure than 7828 with 140 sierra pills over a strain gauge. It is much easier on brass than 7828... rl22 seems to be in the middle; my Pops has burned a bunch more rl22 in his stw than I have. I went straight to rl25 before data was even out, hence the strain gauge.

 

[mikea5232]

Okay very good to know, thank you for the advice! I'll give it a try if r22 don't work out. Or just to try and compare. I have 2 barrels for the gun so I'm not worried at all about doing some shooting and having fun.

 

[WildRose]

I tried it at 600 this evening. only 3 shots fired then ran out of daylight. I don't shoot very often at that distance but I wanted to try. 120g barnes ttsx.

Nothing to sneeze at there. Allshots if centered on a deer or antelopes heart/llungs would weach produce a fatal shot and a happy hunter.

Those are very light loads though for the STW. Depending on your twist rate it will most likely shine best between 140g-180gr.

 

[WildRose]

I've gone with rl25 and 140 AB's/bt's for 12 years now with my 7stw's... rl22 will work about as well...

And with longer barrels RL33 and H1000 really shine especially with the heavier projectiles.

 

[Lefty7mmstw]

And with longer barrels RL33 and H1000 really shine especially with the heavier projectiles.

can't get my 27" 8" twist Shilen to accept rl33 with the 195 berger in cooler weather... In warm weather she shoots well but in cool/cold weather the wheels fall off...

 

[mikea5232]

I have a factory remington barrel with a minimum match spec chamber 0 freebore. Shooting 162 non vlds work but the eld-x bullets are a bit to long and poke further in the case than I like. But maybe that's not much of a problem? I have a bunch of 140 noslers they shoot very well also. I'm fairly new to reloading for these larger cases.