Rebarrel a Model 7 300 SUAM to 270 WSM

[Darryle]

I have a factory 7 300 SAUM, haven't fired a round thru it and have no desire, bought it specifically to rebarrel. I have flip flopped between the 270 & 7MM WSM, but have settled on the 270 WSM. I have a half dozen 300 WSM rifles, a few 7MM WSM rifles but not a single 270 WSM. Looking at a 1 in 9" twist to run bullets up to 150gr.

Anything I need to be aware of before I jump in this rabbit hole?

Thanks

 

[elkaholic]

I have a factory 7 300 SAUM, haven't fired a round thru it and have no desire, bought it specifically to rebarrel. I have flip flopped between the 270 & 7MM WSM, but have settled on the 270 WSM. I have a half dozen 300 WSM rifles, a few 7MM WSM rifles but not a single 270 WSM. Looking at a 1 in 9" twist to run bullets up to 150gr.

Anything I need to be aware of before I jump in this rabbit hole?

Thanks

You would be limiting the performance of the WSM by having to seat the bullets into the case quite a ways. I would take a look at the 270 Sherman short. It will run a 150 LRAB at 3150' at max velocity out of my 21" barrel st 2.855" coal. It will run a 170 Berger at 2950' at around 2.9". It also has better brass made by ADG.
shermanwildcatcartridges.com

 

[25WSM]

Only thing down that hole is a rabbit.
If you need more room in the mag box put a Wyatt's in there the conversion is simple. It's a great round.
Shep

 

[jjmp]

1/9 will be fine for 150's and under ,1/8 would be better for 150's and up your call , lots of shooters and hunters have had great success running the 270wsm, if your not up on Sherman wildcats you should also check them out.

 

[shortgrass]

Only thing down that hole is a rabbit.
If you need more room in the mag box put a Wyatt's in there the conversion is simple. It's a great round.
Shep

The bottom side of a Remington Model 7 doesn't have enough room for a Wyatts box. You'd be into the trigger.

 

[25WSM]

Yeah just noticed it's a model 7 not a 700. I don't know why they put those in model 7s.
Shep

 

[N2TRKYS]

I'd leave your Model Seven as is or change it to a 7 SAUM.
I love my Model Seven SS in 7 SAUM.
I don't find it to be lacking in anything.

 

[shortgrass]

Yeah just noticed it's a model 7 not a 700. I don't know why they put those in model 7s.
Shep

They put the SAUM in the Model Seven so there'd be an ultra-lite option. The manufactures (Rem., Win., Ruger, S&W, Savage and others) don't make any firearm to be modified or changed from the way it left their factory. That thought is not on their minds. I'd guess 95%-99% of firearms that are sold are never contemplated to be modified or changed by the original buyer. Ya', grips get changed on handguns and some up-grade a rifles stock and/or trigger, but that's usually about as far as it goes.

 

[Darryle]

I'd leave your Model Seven as is or change it to a 7 SAUM.
I love my Model Seven SS in 7 SAUM.
I don't find it to be lacking in anything.

Just looking at the ballistics of the 270 WSM vs the 7MM SAUM, with a 150gr bullet, the 270 WSM has an average 100 fps at the muzzle on the 7mm SAUM with a 150gr bullet.

If I am going to change it to a 7mm, I will build it around the 7mm WSM, but the 270 WSM has grabbed my attention.

I have the PT&G one piece bottom metal that I ordered for anther 7 build(375 Socom), but have since ordered the bottom metal for the AICS mags for that rifle.

I really appreciate all the suggestions and help.

Thanks!

 

[N2TRKYS]

Just looking at the ballistics of the 270 WSM vs the 7MM SAUM, with a 150gr bullet, the 270 WSM has an average 100 fps at the muzzle on the 7mm SAUM with a 150gr bullet.

If I am going to change it to a 7mm, I will build it around the 7mm WSM, but the 270 WSM has grabbed my attention.

I have the PT&G one piece bottom metal that I ordered for anther 7 build(375 Socom), but have since ordered the bottom metal for the AICS mags for that rifle.

I really appreciate all the suggestions and help.

Thanks!

I never fooled with the 150s. I'm shooting 160 grain Partitions and Accubonds at 2980fps and 2960fps.
Good luck with your build.

 

[RYEWSKY25284]

I have a factory 7 300 SAUM, haven't fired a round thru it and have no desire, bought it specifically to rebarrel. I have flip flopped between the 270 & 7MM WSM, but have settled on the 270 WSM. I have a half dozen 300 WSM rifles, a few 7MM WSM rifles but not a single 270 WSM. Looking at a 1 in 9" twist to run bullets up to 150gr.

Anything I need to be aware of before I jump in this rabbit hole?

Thanks

Depending on the game you plan on hunting. I hunted one season with a 270wsm and a 130gr Ballistic Tip...... @3300fps ... I should have used heavier bullets. All animals where DRT. But, way too much meat loss. I think a heavier bullet would have minimized the meat loss or, maybe a slower load. (1 deer, 2 antelope) 3 heart/lung shots and lost all three shoulders on the opposite side.

 

[pttp]

More the bullet construction than the weight. Of course, the lighter of two bullets of same type from a given mfg. will expand more.

 

[freddiej]

I am a 270 guy so asking me would be as biased as they get. I would definitely go with the 270 WSM. 1:8" barrel and start with the 150 monos and the heavy Bergers. 150 - 175 grain.
I want to make one of my 270 WSM's into a heavy slug shooter. so planing a barrel swap to a 1:8" or 1:7" twisted 26" barrel and a better scope.

 

[Draftmule]

Consider 26" barrel on that sweet 270 WSM. 140 accubonds @ 3150 - 3200 hard to beat. You will enjoy