Anyone built .375 or .416 Ruger on a Model 70

[Stompbox]

I have started building a few .375 and .416 Ruger rifles for a couple of friends and myself. All of them are going to be on Model 70 classic actions that were originally .300 Win mag or .338 win mag. I got the first .416 threaded and chambered and then test fired. The belted magnum magazine box and or the follower are not working well for retaining and feeding the Ruger cartridges. Wondering if anyone has experimented with different magazine components and had success.

 

[Inline6]

Talk to Waytt, they specialize in the box and followers game. He is a nice guy and can probably help you out.

 

[RStien321]

This is one of the things that prevented me from going with a 375 Ruger when I was looking at building a mid-bore on a M70 platform was magazine - the shoulder is so far forward on the 375 Ruger and the straighter taper of the cartridge is much different than the magazine boxes currently out there are designed for.

Please keep us informed on what you learn - for me, a custom 375 Ruger on an M70 would be a perfect combo in my mind!

 

[cajunchefray]

I have started building a few .375 and .416 Ruger rifles for a couple of friends and myself. All of them are going to be on Model 70 classic actions that were originally .300 Win mag or .338 win mag. I got the first .416 threaded and chambered and then test fired. The belted magnum magazine box and or the follower are not working well for retaining and feeding the Ruger cartridges. Wondering if anyone has experimented with different magazine components and had success.

I was thinking of exactly this last night. Would really like both a 375, first then a 416 Ruger.

As I understand, the magazine box controls the feeding in the post-64 Classic. The magazine in my 7x57 Classic is formed sheet metal.
Easier to modify than forged steel.

I wonder if the Paul Mauser cosine formula would work in reforming the magazine box?

 

[Nhoro]

As I understand, the follower effects the last round feeding. Generally the feed lips of the reciever and the stack angles of the cartridge + diameter of cartridge control the rest. A bigger diameter cartridge will need a wider magazine box to stop from popping up. You can use the mauser formula to get the width. Or just take out the metal magazine box and see if the wood of the stock gives you better feeding.

 

[Muskox]

Unless you just have to have one. I think a M70 would work better in a 375 H&H.