First I would like to say WELCOME to our Forum to both you and
Cantankerous. I hope you get as much information and enjoyment out of our forum as I do.
Sometimes, feeding issues can be addressed by polishing the ramp, if you know how I would say give that a shot, otherwise let a gunsmith polish it for you. It can not only tricky to do but also Overdone. (That would be a Bad thing

)
Another question may stem from the following question: Did you buy it brand spanking new Box, Lock and Papers included or did you buy it second hand? if it's the later then you
MAY want to have either the recoil spring swapped out or the ejector spring (Really don't think that is the issue but when all else fails try the weird stuff it may work) Also if used you may need to give the Mag a good cleaning inside and out, Just be careful to really hold onto the spring when you remove the base plate, cause that puppy Will launch.
And as always make very, very sure the weapon is empty in every way. Even folks with years and years of experience sometimes make mistakes. No Offence.
GW