Makes sense to me. A sizeing die for the SLR is what, $100 or more? It's a pretty cool round and I'd be tempted to give one a try in a little stainless short action Rem I have here. If not for the cost of gearing up.
Here are a couple pictures of my Winchester 70 post 64 short action I would like to use.
You can see that with the bolt in the full rearward position the opening is just over 2.96".
Also, the magazine in its current state is just over 2.86".
I am confident the 'plug' in the rear of the magazine could be modified longer.
If the bolt stop could be set back, in order to pick a round up out of the longer magazine, an overall length around 3.00" is possible.
I have never built a full custom gun before, so I don't know if this is possible or not?
I would recommend you track down and talk to a smith who is very familiar with M70 actions, and get his take on it. Personally, though, it may sound like more work than it's worth. And a bit of a gamble if you don't know how it will all turn out until it's finished.
Originally Posted by cycloneshooter