7mm STW load work complete

[No Promises]

Took time do work-up something acceptable with my load developer here in Texas. Rifle is a stock Sako M995 26" barrel 1:9.5 twist so I was somewhat limited on pushing super heavy bullets. Settled on the 168gr Berger Classic Hunters, had already taken 3 animals at various distances with my 7mm Rem mag & had great results. We didn't see pressure signs until 3200 fps but was a little finicky. Backed off to 73.5gr of H1000 & was getting 3002 fps with a 4 ES, SD 2. I'm happy with that & was able to keep pressure/recoil manageable too (not using a brake)

 

[7stwnut]

It took me 78grs of H1000 with the 168 classic to hit 3,000fps. 26" Sendero.

 

[MagnumManiac]

I am running 2 bullets and 2 powders. Nosler 150g BT's with H1000 and Nosler 168g ABLR with Retumbo, velocities are 3210fps and 3080fps. Accuracy is outstanding for a re-chambered factory Sendero barrel.

Cheers.

 

[wvautomatic]

Very good group. I had better velocity running slower powder. AA8700 was very fast and accurate. I know it's not available anymore but try something in that burn rate and speed will pick up... only if you're wanting more velocity though.

 

[Catbird]

RL26 if you can get it. My factory Sendero is getting 3260 with the 168 classic hunters. Pressure is not a problem. Accuracy is about 3/4 moa. the barrel is not in the best shape. Looking to remedy that soon.

 

[ButterBean]

I'd run the 140's with RL25 like we did back in the day

 

[Lefty7mmstw]

I'm still running 140 ab's with rl25 at 3350 fps.
I've seen what aa8700 can do with 140-150 grain pills. It can flat out haul freight, but it burns dirty enough I switched. I still have a decent amount of it left, but it isn't on the market any longer. The closest powders available now are us869 and wc872. All are old 50bmg offerings.
I have a few 7mm 183's loaded in Bertram brass with a half-hat of aa8700 under them right now. The conditions sucked the last time I was out so I'll re-test them but it seemed interesting, but full throttle and average accuracy at best. I'll probably load a few cut a few grains to see if the accuracy picks up run milder.

 

[ButterBean]

Took time do work-up something acceptable with my load developer here in Texas. Rifle is a stock Sako M995 26" barrel 1:9.5 twist so I was somewhat limited on pushing super heavy bullets. Settled on the 168gr Berger Classic Hunters, had already taken 3 animals at various distances with my 7mm Rem mag & had great results. We didn't see pressure signs until 3200 fps but was a little finicky. Backed off to 73.5gr of H1000 & was getting 3002 fps with a 4 ES, SD 2. I'm happy with that & was able to keep pressure/recoil manageable too (not using a brake)

Nice

 

[wvautomatic]

With 140 grain bullets I had best accuracy and speed with 7828. 26" Hart with 11 twist chrony at 3688 FPS! Shooting 5/8ths group

 

[Lefty7mmstw]

With 140 grain bullets I had best accuracy and speed with 7828. 26" Hart with 11 twist chrony at 3688 FPS! Shooting 5/8ths group

I was able to hit good speed with i7828 but the pressure was over 68Kpsi with no pressure signs at all. I got the same performance out of rl25 at 58Kpsi. At least 7828 at around 3400 fps wasn't running 75Kpsi like the Winchester 150 grain factory in my rifle.

 

[jjmp]

My sako 75 snth 26 factory bbl chronographed 3150 fps with h1,000 and 160 accubonds,using one grain over factory book max ,3 shots into 1/3 my pinky nail.

 

[MagnumManiac]

I am yet to try H50BMG in mine with the 168g ABLR…have a myriad of loads to try with that powder in quite a few cartridges. The 264WM being another good candidate with my custom throats.

Cheers.

 

[3chester]

Retumbo 77gr with a 160gr Nosler Failsafe, stainless Ruger #1, still is an accurate, easy shootN, very Elk capable cartridge. The RL25, 7828, or H1000 they all workD well, in 7 STW.

 

[Catbird]

Kinda sounds like the 7STW thread.