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Posted By: bamagun01 Weatherby MK V 300 mag - 07/12/21
My brother has this rifle and no longer has any use for it. Too much recoil! Can the barrel be removed and the action be chambered for another caliber? I’ve heard of actions being increased in size but didn’t know if it could be reduced to something like a 270 or 30-06. Or any other suggested calibers. He hunted in the west earlier in his life but now due to health issues he’ll probably only be hunting near home for whitetails.
Thanks for any information.
Posted By: Kp321 Re: Weatherby MK V 300 mag - 07/12/21
Much easier to make an action take a larger cartridge than a smaller one. The best option would be to trade for a smaller caliber rifle, Mk V’s were available in standard calibers. Another option would be to reload for it, easy to produce lighter loads with less recoil.
Posted By: bamagun01 Re: Weatherby MK V 300 mag - 07/12/21
Originally Posted by Kp321
Much easier to make an action take a larger cartridge than a smaller one. The best option would be to trade for a smaller caliber rifle, Mk V’s were available in standard calibers. Another option would be to reload for it, easy to produce lighter loads with less recoil.



Good information. Thanks
Posted By: dale06 Re: Weatherby MK V 300 mag - 07/17/21
I believe you could rebarrel that to a 257 weatherby. Lot less recoil and a laser trajectory.
Posted By: navlav8r Re: Weatherby MK V 300 mag - 07/17/21
I just bought one and my first project is working up a load in the 300 H&H range with 168-180 gr bullets.
6.5-300,7MM STW , 300 H&H and anything that is based off the 300 wby case.
Posted By: Dirtfarmer Re: Weatherby MK V 300 mag - 07/18/21
Originally Posted by Oldelkhunter
6.5-300,7MM STW , 300 H&H and anything that is based off the 300 wby case.

Agree. I’d stay with 3.6” mag length cases. The 257 Wby is shorter, though it may feed OK.

One can load the 300 Wby to about any power level desired. Full house loads aren’t needed for everything. And they do tend to slap ya.

DF
Posted By: Dave_in_WV Re: Weatherby MK V 300 mag - 07/18/21
Load 165gr bullets with 60% of a max load of H4895 or IMR 4895.
Posted By: Sakoluvr Re: Weatherby MK V 300 mag - 07/25/21
Selling the rifle and buying what he wants will be the cheapest and simplest approach. He will take a hit if he trades it to a dealer, but so what. Maybe bring it to the next gun show.
Posted By: FWP Re: Weatherby MK V 300 mag - 07/25/21
Originally Posted by Dave_in_WV
Load 165gr bullets with 60% of a max load of H4895 or IMR 4895.


Yep!! Smart move.

If he or you reload it would be better and cheaper to download the 300 Wby ammo to 30/06 velocity. It would reduce the recoil and not devalue the rifle.

If that is not an acceptable option I think it would be better to sell his rifle and buy a different one. Weatherby's are a popular rifle and you should have no problem finding a buyer.
Posted By: navlav8r Re: Weatherby MK V 300 mag - 07/26/21
Originally Posted by Dave_in_WV
Load 165gr bullets with 60% of a max load of H4895 or IMR 4895.



That’s exactly where I started. Now I’m just waiting for a little cooler and a little dryer day to try them.
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