SR768 ignorance

[grobin]

I'm thinking of getting a SR768 for a little hunting but more target shooting. Is it possible to rebarrel it with a slightly longer barrel and a more 7.68 friendly twist?

 

[pisgah]

I have to admit, I am stumped. What's a SR768?

 

[mhblaw]

Perhaps he means an SR 762?

 

[pisgah]

Perhaps he means an SR 762?

Or perhaps a SR556 in 6.8 SPC?

 

[grobin]

Sorry I can do typos without my fingers ever leaving my hand.
SR-762 uses a piston system and AFAIK the barrel must be milled to have a port at the right place or am I wrong? Is this something that can be done at a reasonable cost?

 

[22/45 Fan]

The factory twist is 1:10 which is just about universal for 7.62 NATO/.308 Win. What do you want that's "better"?

As to a longer barrel, from a cost standpoint, you would be better off to start with a rifle more suitable for you needs rather than putting a lot more money into an already expensive gun.

 

[grobin]

I think that you have a point. I'd like a 22" barrel with a 1:7 twist for long range (metallic target) shooting so I could use heaver bullets. Likewise so I could have a moose gun. But I have been researching and find several tests that show little velocity/accuracy difference between a 16" and a 22" barrel. My concern is that the 16" barrel will not allow heaver bullets to stabilize particularly with slow powders. While the 16" barrel has advantages on things like train fire ranges it will have a higher recoil and will not be as easy to point as a longer barrel. I may be barking up the wrong bush and am still looking at alternate rifles. The AR15 chassis is attractive as it allows a lot of customization with little cost. Frankly the other rifles I have looked at with similar characteristics cost more. If I don't really want a semi-auto the BLR in 7mm 08 looks attractive; except that I would get on the hand loading slippery slope.

 

[22/45 Fan]

....except that I would get on the hand loading slippery slope.

Well, for many of us that is a slope well worth sliding down.

I believe a 1:10 twist will stabilize even 200 gr bullets at .308/7.62 velocities. The 1:7 and similar twists are used in 300 Blackout/Whisper barrels to stabilize even heavier bullets at very low (subsonic) velocities.