7mm SAUM in Long Action Mags

[Young_Engineer_89]

Hi all,
I just got a 7mm SAUM built on a long action. I am having some issues with getting rounds loaded into the mag. The body of a SAUM case is lager in diameter than the inside width of the mag. The only way I can get the rounds in the mag are to line the case head up with the ribs in the side of the mag. This works fine on the bench and what not. But when I take the mags into the field the rounds shift slightly and then get hung up causing failure to feeds. I am thinking of taking the follower out and cutting it down, and cutting a spacer to fit in the back side of the mag that will prevent the rounds from shifting in the mag. My worry is how to get the spring to still work properly.

Here are some pics





Has anyone had this problem before? what was your solution? Am I going overboard?

Thanks,
ye89

 

[gme]

That looks like a 300wm mag? the .338 mag (non CIP) works fiine and fits in the same magwell

 

[Young_Engineer_89]

Yes it is a 300wm mag, didnt think of the 338 mag, thanks

 

[pangelos]

I can't tell if those are 5 or 10 round mags. I have never had an issue with the 5 round mags (with a 7 SAUM) but with the 10 rounders that my buddy's have they had to have the back ribs milled out. It seems to function fine. Both have hundreds of rounds through with no issues.