Gunsmithing 6.5mm-270WSM
- Thread starter Leonard Barnes
- Start date
I doubt many people will be doing that .
It would be basically a 6.5 x 284 or similar to the new 6.5 PRC.
Most would rebarrel instead to something brass is available for.
It would be basically a 6.5 x 284 or similar to the new 6.5 PRC.
Most would rebarrel instead to something brass is available for.
I have one and it's 250 fps faster than the 6.5x284 I had . I wouldn't recommend it for volume shooting but it's an awesome hunting cartridge. Bertram sells proper headstamped brass.
I'm not sure, it's my 1st one. I've put about 90 rounds through it and the throat hasn't moved , but I don't have a bore scope to check for fire cracking.
I'm guessing it'll probably shit the bed around 7-800 rounds the way I'm treating it.
I'm guessing it'll probably shit the bed around 7-800 rounds the way I'm treating it.
6. Zee
6.5
wsm is very overbore.
the 270 headspace is .049 longer than a 300 wsm
you will get 5 to 700 rounds before it is trash. Lots of better choices with either a 7 or 30 cal. And better choices of projos What is your primary intended use of this rifle?.
Alan
6.5
wsm is very overbore.
the 270 headspace is .049 longer than a 300 wsm
you will get 5 to 700 rounds before it is trash. Lots of better choices with either a 7 or 30 cal. And better choices of projos What is your primary intended use of this rifle?.
Alan
270 and 300 wsm have the same headspace, it's shorter than the 7 wsm.
A 6.5/270 wsm is about half way between a 300 WinMag and a 300 Norma on overbore, so the barrel life will be in that range. Probably more in the Norma direction.
I shoot a 7/300 wsm a lot using 270 brass. Necking up from .277 to .284 isn't much of a wildcat. Necking down to .264 wouldn't be either. I use a 7 wsm seating die and 270 bushing sizer with 7mm bushings.
The advantage of the 7/300 over the 7 is it's easier to find decent brass. I'm at about 1200 rounds. I'm not sure how much further it'll go, but it still shoots. For stuff in the 243 - 338 range, a coarse rule of thumb is you cash out about 1/3 the barrel life for every half mm you neck a given case down.
A 6.5/270 wsm is about half way between a 300 WinMag and a 300 Norma on overbore, so the barrel life will be in that range. Probably more in the Norma direction.
I shoot a 7/300 wsm a lot using 270 brass. Necking up from .277 to .284 isn't much of a wildcat. Necking down to .264 wouldn't be either. I use a 7 wsm seating die and 270 bushing sizer with 7mm bushings.
The advantage of the 7/300 over the 7 is it's easier to find decent brass. I'm at about 1200 rounds. I'm not sure how much further it'll go, but it still shoots. For stuff in the 243 - 338 range, a coarse rule of thumb is you cash out about 1/3 the barrel life for every half mm you neck a given case down.
I haven't shot my 6.5-270 much lately so I just checked and I'm using 270 WSM brass. I've got well over 500 rounds down this one and it's just as accurate as ever. A bore scope would suggest otherwise but the targets suggest it's good. I had it running at 3300 with 140's and R26 at one point but it seems like 3150 better.
I'm getting 3340 in my 6.5 Sherman Short with 126 Hammer Hunters (130 Sciroccos gave 3250) and I have no issues with magazine space in a short action. My 6.5 WSM was on a long action to have enough space in the mag. Since building the 6.5 SS I don't shoot the WSM any more. The WSM is way easier to make brass, though.
I'm getting 3340 in my 6.5 Sherman Short with 126 Hammer Hunters (130 Sciroccos gave 3250) and I have no issues with magazine space in a short action. My 6.5 WSM was on a long action to have enough space in the mag. Since building the 6.5 SS I don't shoot the WSM any more. The WSM is way easier to make brass, though.
Similar threads
Reloading Equipment
6.5 / .264 Projectiles various brands
