Looking for powder suggestions for my 257 Roberts.

Rifle is a Ruger M77 (long action)
Bullets will be Barnes 100gr TSX and TTSX.

Thanks all

IMR 4895

H4350. 46-47 grains.

IMR 4831

H4350

IMR4064 will normally give some good loads but I like H4350.

Anyone tried RL15 ?

I had great luck with RL15 and the 75 grainers, I think it is too fast burning for the 100s.

My Dad is using RL15 in his SA Model 70 with a Douglas barrel. Shoots great with 100 gr. boolits, right at 3000 with a 22"....

+2 for H4350.

The JB load is 46.0 with 100 grain bullets.

Easy to load, easy to shoot.

Steve

IMR4350 has been the powder in my rifle. With 100 gr bullets or up to 117 gr bullets.

His load is 42.0 grains, approach with caution..........

My AI loves RLs -15 & -17, but the standby is IMR-4350.

Yep, used Nosler #6 book max load with 85 NBT. Think it was 43.5 grains. Shot well in my Montucky Bob...