gouged brass on M1 Sales upper

[cubflyer75]

I'm having a problem with the feed ramps gouging the shoulder of my brass when feeding from the magazine. This is more pronounced with a 200gr cast bullet. Has anyone else had this problem? Should I just radius the edge of the feed ramps slightly? thanks, Mike

[Pitt300]

What mags are you using?
I had some scratching from some surplus GI METAL mags.
You can file the top front lip on the metal mags to use w/your "heavy" 300W loads.
I put red tape around the mags that I've modified for use w/208/220/240g loads due to location of ogive in the mag.
However, since I switched to MagPuls-NO issues.

[Flewis]

I'm using PMags with my M1S upper and having the same trouble.

I can post some pics of the brass tonight.

[Flewis]

Also, I didn't have the problem using GI mags and once-fired brass. Well, I should say I didn't notice it but I think I would have. I'll check.

However, when I switched to new Winchester brass and PMags I noticed the gouges.

[Pitt300]

Got me?
I radiused my GI mags & it stopped.
Wonder if your softer cast bullets are not "feeding" up the ramp as smoothly?
Do you have same gouging problem when you do loads w/220-240g SMKs?

[Flewis]

Originally Posted by Pitt300

Got me?
I radiused my GI mags & it stopped.
Wonder if your softer cast bullets are not "feeding" up the ramp as smoothly?
Do you have same gouging problem when you do loads w/220-240g SMKs?

My has had only 220 SMKs run through it.