In my .300 Win Mag, I found that the 180 NBT was slightly more accurate than the 180 NAB over same charge of RL-22...

I'm now using up my RL-22, replacing it with RL-23, similar performance, better powder.

MRP is almost a RL-22 clone, said by some to be a more refined version. I use it in my Swede with 139 Scenars.

If I was still working with the .300 WM, I would be trying RL-23 and MRP...

I have an HS .240 Wby that prefers the 100 NPT over all others. You just never know until you try.

It would be interesting to see what that problem 300 WM would do with 200 NPT's.

DF