Originally Posted by Southernfryedyankee
when you can just have a 338 RUM? The 338 edge is just a 300 RUM necked up right. So whats the point? I am wanting to build a custom and the 338 edge is in the lineup of possibilties but is it worth the effort especially if I start reloading?
The difference is 4 to7 grains of powder capacity.
Necking up is not a problem but you will get a little neck thining.
If it were me I would use the 375 RUM brass necked down and turned true.
I chose the 338 RUM because it is the ballistic equal in a Mark 5 action because
the bullets can be seated .100 thousandth longer allowing loads to be equal.
Mine will deliver over 1500 ft/lbs @ 1200 yrds and thats enough for me and I can
buy ammo if I get off somewhere without my reloads.
The only way to realy better the RUM is to go with a case that has a capacity of
120+ grains of powder.
Just my opinion
J E CUSTOM