7 PRC Feeding issues

[Caseknife]

Rebarreled a Rem 700 7mm Mag to 7 PRC. Having a bit of an issue with the first round out of the mag when 3 are in there after firing the round in the chamber. That first round wants to completely jump out of the magazine and turn sideways, essentially stove-piping. Doesn't do it with subsequent rounds from the magazine. This a 700 BDL with factory bottom metal and it never had an issue as a 7mm Mag. Only has 20 rounds through it right now, factory Hornady ELDM. Any ideas where to look for possible issues, or do I just load two in the mag and go from there?

 

[MS 9x56]

Rebarreled a Rem 700 7mm Mag to 7 PRC. Having a bit of an issue with the first round out of the mag when 3 are in there after firing the round in the chamber. That first round wants to completely jump out of the magazine and turn sideways, essentially stove-piping. Doesn't do it with subsequent rounds from the magazine. This a 700 BDL with factory bottom metal and it never had an issue as a 7mm Mag. Only has 20 rounds through it right now, factory Hornady ELDM. Any ideas where to look for possible issues, or do I just load two in the mag and go from there?

The magazine carrier spring due to the fat cases.

 

[Curvebow]

I have a Model 700 in 7mm Rem Mag and it only handles 2 down in the magazine with one in the chamber. Putting 3 rounds in is waaaaaay too tight to work. Its a fat cartridge penalty! I would guess the 7mm PRC to be perhaps worse since the whole case is as fat as the belt on the Rem Mag version. Simple fix; just 2 down....

 

[cahunter805]

Get an Ultra Mag box with the window cutout. It will feed much better.

 

[Forkyfinder]

Think you need a 300 PRC or 300 rum mag box

300-PRC Box - Wyatt's Outdoors

This is our box for the long action PRC cartridge family. It’s very similar to our MBE-3 except that the window has been moved to the proper location for the PRC. This box is also an extended box and allows a cartridge overall length of 3.830″. The box is stainless steel.

wyattsoutdoor.com

 

[Caseknife]

I can see the fat cartridge making a difference, is the RUM or Wyatt's box wider allowing the cases to spread out and lessen the spring tension?

 

[cahunter805]

I can see the fat cartridge making a difference, is the RUM or Wyatt's box wider allowing the cases to spread out and lessen the spring tension?

The cutout window in the box is to accommodate the fatter case.

 

[Caseknife]

Thanks for the tips, have Wyatt's 300 RUM box on the way.