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Gunsmithing 300 WSM

Re: 300 WSM

channelcat,
I dont think Rem actually makes WSM actions or didn't. What needs to be done is to take a little off the edges at the entry point of the raceway at a time with a dremmel untill a case will pass with .015 clearance on both sides. You can then finnish the edge with emery cloth. I had to do it, it only took a couple light passes and wasnt hard to do at all.

If you really want a measurement, measure the web and rim area of a fired case and add .003 to .005

Good luck
 
Re: 300 WSM

The magnum LA that I have had to be opened just a hair as the case wouldn't fit through the bottom races above the magazine slot of the action. You only need to relieve the back 50 percent of the race as the case taper will pass the rest.
 
Re: 300 WSM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LR-WSM</div><div class="ubbcode-body">The magnum LA that I have had to be opened just a hair as the case wouldn't fit through the bottom races above the magazine slot of the action. You only need to relieve the back 50 percent of the race as the case taper will pass the rest. </div></div>

Same experience here. I have a .300 WSM built on a Remington 700 magnum LA, it has to be opened up just a tad bit. Otherwise they wouldn't feed out from under the magazine slot.