What powder for a Winchester M70 270 for 1000+ yrs.?

[JD270]

I have a Winchester M70 270 made in 1935. I can shoot a .25 group at a 100 yrs. with 130 gr. or 150 gr. bullet using H4895 powder. I shot a mountain goat at 800 yrs.

 

[PPR]

That's an old mt.goat! Lmao!

 

[JD270]

It's horns where a 1/4" short of making a record.

 

[Stammster]

Was the serial number negative?

 

[Dosh]

Was the serial number negative?

Winchester Model 70's began production in 1936.

 

[gyrfalcon]

I have a Winchester M70 270 made in 1935. I can shoot a .25 group at a 100 yrs. with 130 gr. or 150 gr. bullet using H4895 powder. I shot a mountain goat at 800 yrs.

Your 1:10 twist will not support bullets suitable for extreme long range. Best stick to your 800 yard load and try it at 1000 and see how it pans out