The concern with shooting a varmit bullet from a 300 Win Mag is you can literally overspin the bullet. It will come apart a short ways from the muzzle and spend shrapnel out radially down range. The jackets are thin, and they are built to work within a range of ideal velocities.

Now you can download some, but with the large case capacity of the 300 Win Mag you have to be careful not to download below 80% fill. You’ll start getting inconsistent P/V and if you download low enough it’s not unheard of having a detonation. It’s rare, but it can happen with a powder and lots of unoccupied case volume.


I did some 150gr loads with 300 Win Mag which would be excellent deer or elk loads. I think the lightest I would go bullet wise would be a 130gr but I would also not push it to the max.


Reloading...it’s like knitting for men.