Home Forums Hunting & Shooting Long Range Hunting .270 WSM vs 7 WSM

I typically use 7828ssc, which is very temp stable in this application. I've also got a great load with R26, which has also been pretty stable, IME.

I get very similar velocities with equal charge weights of 7828ssc and R26. It doesn't take R26 to break 2900 fps with the 180 ELD.

Again, you're inventing this 2800 fps limit. I can get ~2950 fps with 7828ssc and the 180 ELD in 24" barrels. The .270WSM isn't beating that. And if you want to take things a step further, we can always compare aluminum tip to aluminum tip, and go with the 190 ATip with 0.838 G1 BC at about 2825 fps in a 24" barreled 7WSM.

I get 2850 from a 21" 7wsm with 180 ELDMs and H-1000.

Just open said parcel today. Billed COAL is 3.630",but I measure 3.645",which is a"nice" problem to have. Hint.

With a 180 ELD in 280 SALAMI. I typically set throats to kiss same at 3.585",which is shorter than pictured by .050" or so. Hint.





Dummies slip/slide nicely,as per typical AICS DBM's do. Hint..............

Should have added,with said throat geometry,190 Beer Cans play nicely too...in 280 SALAMI,280 Aye Eye and 7mm RemMag. Hint.



Just sayin'................

Very nice. That OAL leeway is more friendly than the SA version. I've got a handful of those, but their utility is limited.

I've replaced those parts in my T3X with Mountain Tactical bottom metal and long action billet magazine. Not the equal of the CTR or AICS I'm sure but better than stock I suspect.

Yes, at 2950 for the 180 in the 7mm WSM at 600 yards, the 10 mph drift is 15.3 v 16.0 inches for the 150 .270 WSM, at 500 yards 10.4 v 10.9 inches, 400 yds 6.5 v 6.8 inches. The .270 WSM has less drop.

I'm a S/A AICS DBM Slut,along with AW and CTR...depending upon the platform. Hint.

On a S/A 700,it's easy to upsize/downsize a boltface,to get where you want to be and then feed it flawlessly ala AICS. Also dig 'em on some OEM offerings and when opting binderless mags,they do some nice COAL favors(MUCH greater than the above L/A AICS). Hint.

This was waiting for me,when I got home. Nice to change barrels sooooo easily and convert mags. Accuracy International AT-X in Seex Kreed. Yanked OEM spout before firing,installed a K&P 1-7" Dasher tube,swapped mag guts and was off to the races,less feed/function/COAL concerns. Hint.








It's the only way to drive a 700 S/A in Whizzum or ShamWow. Though I MUCHLY prefer a Montucky there. Hint.




Some OEM S/A favorites wear same. Hint.




Mag selection,is of course paramount,for feed,function and COAL. Hint..............

MT makes some good stuff and you are stepping in the right direction. I don't have a Teeker,that doesn't wear some of their parts. Hint.



They are horribly fhuqking up,by not continuing their AICS DBM's though. Hint.





They make for HUGE gains of COAL,in 223 especially,which is an OEM Fhuqk Show. Hint.





Their Rimfire stuff is good too. Hint.




Be curious to hear,how it all sorts out for you. Hint.................

R26 has also been nicely temp resistant with 175 TGK in my 8" twist 270 WSM. I have only shot from about 30-90 degrees but it has been only about 15 FPS variation in that range. I'm only running those 175's at about 2850 but they do great at that speed.

Sounds like you decided on staying with the 270 WSM when you rebarrel. Feel free to PM me when you do it to share some load data. I am limited to only a little over 3.02" in OAL by my magazine so we might not be "apples-to-apples", but if you're seating longer at least all my loads ought to be conservative for you.

Cheers,
Rex

Thank you Rex, I will definitely take you up on that.

I shoot the 7mm WSM and love it. That said, you need to look at a few things - Availability of brass, over the counter ammo in a pinch and what you are shooting.

Lapua just announced 300wsm brass. With a little work you can make 7mm wsm from 300wsm yes?

Perhaps if you read this thread, you will find this point discussed in detail.

Very little work. Just run the brass through a 7mm sizing die, sizing further and further down the neck until you get a bit of a crush fit in your chamber, leaving the base of the neck the factory diameter.