SKS feed ramp modifications ?

Murray 3-D

Murray 3-D

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Anybody here dabbled with modding the feed ramps on their SKS rifle ? Its evident the gun feeds the FMJ rounds it was designed to fire fine. But yet HP's and SP's seem to be dodgy. Im tired of watching half of the polymer tip or lead tip of my hunting rounds get chewed off everytime i chamber a round. Ive done research into modding the feed ramps online elsewhere, but am curious if other CGNers have done it ?

Main area of concern is how much material i can get away with removing haha. Lots of talk about 4-8 o clock for the region.... but that sounds kindov excessive.
 
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The big question is did you see any negative effects in accuracy from bullet tips being deformed, if not I wouldn’t worry about it. My Enfield will deform lead sp tips from loading and unloading during the season while looking for deer, after a test fire to confirm zero with a round or two that had some tip deformation I didn’t see any change in my poa/poi or group sizing.
 
Not sure of that yet, it may be negligible considering the accuracy of the SKS. The polymer tips may deform, but they do always feed. SP on the other hand do fail to feed occasionally. Once while i was shooting at a Black Bear lol that wasnt cool and is a big reason why i dont usually use SP in an SKS. Unfortunately the polymer tips often become hard to find so im wanting to open the door once again for SP's to be utilized.

Magazine are often blamed for SPs failing to feed, and normally id agree with that. BUT ive witnessed on 2 separate occasions factory SKS rifles also failing to feed SP's.
 
OP, SKS feed ramps are notoriously rough.

This doesn't effect the feeding of fmj, as you stated.

The solution for feeding polymer or soft point ammunition is to polish the feed ramps, until they're bright and shiney.

This was also the fix for M1 Carbines with similar issues.

My shooter SKS will feed any type of bullet, other than .308 diameter, 110 grain Hornady exposed lead, hollow points.

I did slightly open up the feed rails, at the front, so the cartridges would tip up a few degrees more, for a smoother approach to the chamber.

You need to be very careful when stoning the feed rails. It's quite easy to take off enough and cause them to tip up to much. This just about ruins the receiver IMHO, unless you get it TIG welded and fill in what was stoned off.

It only takes a couple of thousandths of an inch on each side to get the correct angle.

Load up some dummy rounds and keep at it until it works.

This usually entails breaking down the rifle and putting it back together again several times and of course purchasing a FINE HONING STONE.

DO NOT USE A DREMEL, WAY TO AGGRESSIVE and if it skips on you, fugly marks to declare amatueur at work.
 
Murray 3-D said:
Not sure of that yet, it may be negligible considering the accuracy of the SKS. The polymer tips may deform, but they do always feed. SP on the other hand do fail to feed occasionally. Once while i was shooting at a Black Bear lol that wasnt cool and is a big reason why i dont usually use SP in an SKS. Unfortunately the polymer tips often become hard to find so im wanting to open the door once again for SP's to be utilized.

Magazine are often blamed for SPs failing to feed, and normally id agree with that. BUT ive witnessed on 2 separate occasions factory SKS rifles also failing to feed SP's.
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funny about the sp bullet as i shot 3 differents sks d and not of them had issue with the feeding part. but holding or keeping the mag was another story ...
 
medvedqc said:
funny about the sp bullet as i shot 3 differents sks d and not of them had issue with the feeding part. but holding or keeping the mag was another story ...
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I surmised from his post that he was describing hand loads, maybe light loads.

That's what my shooter grade had issue with.

Factory loads with different bullet shapes all functioned properly.
 
Murray 3-D said:
Not sure of that yet, it may be negligible considering the accuracy of the SKS. The polymer tips may deform, but they do always feed. SP on the other hand do fail to feed occasionally. Once while i was shooting at a Black Bear lol that wasnt cool and is a big reason why i dont usually use SP in an SKS. Unfortunately the polymer tips often become hard to find so im wanting to open the door once again for SP's to be utilized.

Magazine are often blamed for SPs failing to feed, and normally id agree with that. BUT ive witnessed on 2 separate occasions factory SKS rifles also failing to feed SP's.
Click to expand...

Od, I’ve run ppu, mfs sp as well as sst’s through a couple sks and they fed just as reliably as the fmj ammo. There’s not really a feed ramp, iirc the follower points the nose of the round at an upward angle into the mouth of the chamber more than anything. If making a bit of a ramp from the forward edge of the mag/magwel will help I’d start there, as well as a good polish.
 
You're right, I'm going on about the narrowing ramps on the sidewalls. I should have been more specific, instead of just assuming people knew what I meant.

The rifle I worked on had very rough guides, that damaged lead tips and impeded feeding.

Sorry for that.

That's also why I suggested the angle of the feed rails needed to be honed.
 
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