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Help/advice please. . .

slm9s

Sergeant
Full Member
Minuteman
Aug 18, 2008
783
75
WA
I have a Mark V in 270wby sporter that I never use as I have lighter hunting rifles, but its got a SMOOTH action, great trigger, and I shot my first elk with it so I don't want to sell it.

I'm thinking of transforming it into a heavy barrel switch-barrel setup. One in 7RM and one in a 338 cartridge, I'm currently thinking 338 RUM. The use will be long range practice with maybe elk hunting.

I'd order two CM barrels, around .8 to 1" at the muzzle. A local gunsmith built it as the 270wby. He said he could set it up as a switchbarrel. I'll get an inexpensive Mark V stock as I'll have to really open up the barrel channel (I already have a line on one).

Will a single Mark V action feed these 3 cartridges reliably? (270wby, 7RM, and 338RUM) I could go 270wby, 7wby, and 340wby; but the brass cost is out of control. The 338RUM seems to be the best value in big 338s. I already reload for the 7RM.

When you change barrels on a switchbarrel, do they usually come closed to holding zero, or do you waste a few rounds each time sighting it in?

Anything I'm missing?
Other thoughts?
 
Re: Help/advice please. . .

Most switch barrels you have to hold the action in a vice of some sort which requires removing the scope/base (some don't). I do Savages and any variance will cause a POI shift. So plan on burning a few rounds each time to get back on target.

If going to 338RUM, look into doing a 338 Edge instead for you long range shooting.

Good luck!
 
Re: Help/advice please. . .

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hawk45</div><div class="ubbcode-body">
If going to 338RUM, look into doing a 338 Edge instead for you long range shooting.
</div></div>

I think the 338RUM will give me all the speed/range I'll need and my gunsmith has a reamer for it.