Winchester 243 twist rate

[Mac_63]

If anyone knows what the twist rate might be or where I could find out that would be great

It's a Winchester XTR 243 varmint made in 1979

 

[stubblejumper]

1 in 10".

 

[horseman2]

.17 HMR = 1 in 9"
.22 Long Rifle = 1 in 16"
.222 Remington = 1 in 14"
.223 Remington = 1 in 12"
.22-250 Remington = 1 in 14"
.243 Winchester = 1 in 10"
6mm Remington = 1 in 9"
.240 Wby. Mag. = 1 in 10"
.25-06 Remington = 1 in 10"
.257 Wby. Mag. = 1 in 10"
6.5x55 Swedish Mauser = 1 in 7.5"
.260 Remington = 1 in 9"
.264 Win. Mag. = 1 in 9"
.270 Winchester = 1 in 10"
.270 WSM = 1 in 10"
.270 Wby. Mag. = 1 in 10"
7x57 Mauser = 1 in 9"
7mm-08 Remington = 1 in 9.25"
.280 Remington = 1 in 9.25"
7mm WSM = 1 in 9.5"
7mm Rem. Mag. = 1 in 9.25"
7mm Wby. Mag. = 1 in 10"
.30 Carbine = 1 in 16"
.30-30 Winchester = 1 in 12"
.308 Winchester = 1 in 12"
.30-06 Springfield = 1 in 10"
.300 WSM = 1 in 10"
.300 Win. Mag. = 1 in 10"
.300 Wby. Mag. = 1 in 10"
7.62x39 Soviet = 1 in 10" (Ruger)
.303 British = 1 in 10"
.32 Win. Spec. = 1 in 16"
8x57 JS Mauser = 1 in 9.25"
.338 Win. Mag. = 1 in 10"
.340 Wby. Mag. = 1 in 10"
.357 Mag. = 1 in 16"
.35 Remington = 1 in 16"
.35 Whelen = 1 in 16"
.350 Rem. Mag. = 1 in 16"
.375 H&H Mag. = 1 in 12"
.378 Wby. Mag. = 1 in 12"
.416 Rem. Mag. = 1 in 14"
.416 Wby. Mag. = 1 in 14"
.44 Rem. Mag. = 1 in 20"
.444 Marlin = 1 in 20"
.45-70 Govt. (Marlin and Ruger rifles) = 1 in 20"
.450 Marlin = 1 in 20"
.458 Win. Mag. = 1 in 14"
.460 Wby. Mag. = 1 in 16"

And now you have them all . . .

 

[Mac_63]

Thanks guys that is good info.

 

[Mac_63]

Any idea if this will shoot anything special?

 

[steyrman]

Most 1-10"s will handle from 55 to 100 gr with good accuracy, anything heavier is best with a 1-8". Barnes has an 80 gr TTSX that is flat shooting and works very well on deer size game, the .243 55 gr rivals the 22-250 & 220 Swift with the same bullet weight, and is very flat shooting.

 

[c-fbmi]

Don't bother trying 100 gn spitzer boattails they don't usually like the 1-10 twist...............Remington uses a 1-9 in their 243s.............much better for heavier bullets.

 

[RememberTheSomme]

Mac a nice looking rig. Same as my 7mmRM except barrel length and no recoil pad. Did I see that for sale just recently??

All the M70's I own or have owned,.. would shoot Super-X silver box ammo very accurately. I'd try some 100PSP's silver box in it for a base line. My .243FWT pre-64 would shoot less than 2" at 200 with 100grPSP Super-X. The 1/10 is good to go with these flat based 100 gr bullets.
It would seem Winchester did mate up their Super-X line perfectly in the accuracy department for their M70 rifles. If she don't group well with this ammo, a tune up may be in order, starting with the scope/mounts, screws, bedding, muzzle condition and so on and so forth...........