257 Weatherby Mag and 100grn TSX and IMR 7828?

[mike88605]

I'm looking for load data for my 257 Roy using IMR 7828 and 100grn TSX.



Any help would be great.

Thanks Mike

 

[Mr. Outdoors]

I loaded 7828 in .264 win mag and a 100gr NBT. I had a really tough time getting consistent accuracy. I ended up using rl-19 and it worked great and could achieve better velocity as an added bonus.

 

[TNdeerhunter]

Around 72-73gr of RL22 is what your looking for in the .257 Roy and 100gr pills! I'm getting 3,632/fps from my Vanguard Sub MOA and the 100gr TSX.

 

[ChrisBlevins]

What I have found with 7828 and my 257 is that it works much better with heavier bullets than 100 grain. N160 works the best with my 100gr but I don't get the speed out of that powder, but I get one hole groups everytime.