Feed Ramps
 

I've been thinking again about wanting to shoot round nose bullets in my Whisper. I tried it in the past with bad results because the round nose bullets hang up on my feed ramps, causing the bullet to be jammed back in the case. Well I was reading the other day about someone enlarging their feed ramps for use with a 50Beo, and was wondering if this would work for use with my Whisper. What is ya'lls take on this?

should work, but have you tried magpul p-mags? Also you might have problems if its a m4 cut upper, dunno but something to think about.

Yes it will work. I have done it with other cartridges and will be doing it this week to our prototype 335 THUMPERS because we just got some 250 and 300 grain round nose bullets.

Yeah, pmags is about all I use. It is a Spike's M4 upper with a TP555 barrel.

What process do you use to enlarge them?

Search quarterbore archives their were pictures and how to with dremel tool many years ago. It just takes a steady hand.

It depends if I am doing just the extension, barrel and extension or compleate upper. I prefer to do it in my mill but will use my fordom in some cases.

So would I just open both ramps up to about .308 and polish? Seems like a dumb question, but I don't want to mess anything up. Example: Maybe take a .308 dremel stone and go to work on them slowly?