bearstalker the people I know who are using 150's in the Mashburn are generally getting 3250 fps,or a bit more(not quite 3300) or about 100 fps more than 79 is getting with his rifle.
I got that velocity with 150's in the 7mm Dakota and the cartridges are very similar in velocity.
What mine will do with 150's I can't say as I have never fed it anything lighter than 160, unless I was fire forming.
