Well, that's not too descriptive. Suppose you meant "choke".
But, a feed ramp failure is often a magazine problem. Put a good mag in it and try again. Tripp, McCormick, Colt are some of the best. Wilson would be if they'd make a no-base-bumper model again.
Feed ramps do work better nicely smoothed and polished and aligned so the barrel lip does not stick out over the top of the ramp....
Sounds like your pard's gun needs a light action job, not necessarily a different slug. Tell him he really ought to WANT his 1911 to feed most ammo, because that is TRUE.
If the slug you are using has a wide meplat (the flat tip at the front), 1911's hate trying to shove that up a feed ramp, even if it is well tuned. A truncated cone design feeds much better. Or a conventional round nose (which can be considered to be a "very small meplat").
Good luck, GJ
http://shopwilsoncombat.com/mobile/1911-Service-Mag-Plus-45-ACP-Full-Size-7-Round-Stainless/productinfo/608/
Uh, Joe, you mean like these Wilson magazines?