doubleh
Member
I am certainly no 1911 quru but might be lucky with them. I have only owned only 4 in 45 APC, a 70 series Colt gold Cup Nation Match, 2 PT 1911s, and a Ruger with the factory barrel and an Ed Brown barrel and bushing.. None have failed to feed any bullet design from any magazine including GI surplus ones. A handload using 185 gr, lead SWC bullets gave me the best accuracy in the Colt and PT 1911 guns. The Ruger hasn't been quite as good with either barrel but I will blame that on me as the first results were obtained several years before I acquired the Ruger.
If I remember correctly the 1911 was designed to use 230 gr. round RNFMJ ammo and was not tightly fitted so it would reliably function under combat conditions. There have been many modifications made to the basic design to improve accuracy and various problems have occurred. If you could find a reliable SWC shooter to compare your gun to it might prove to be a big help in solving your problem. Something as simple as a slightly rough feed ramp can interfear with feeding. I had a 9mm RIA that would not feed even FMJ ammo without frequent jams and an easy feed ramp polish solved the problem.
If I remember correctly the 1911 was designed to use 230 gr. round RNFMJ ammo and was not tightly fitted so it would reliably function under combat conditions. There have been many modifications made to the basic design to improve accuracy and various problems have occurred. If you could find a reliable SWC shooter to compare your gun to it might prove to be a big help in solving your problem. Something as simple as a slightly rough feed ramp can interfear with feeding. I had a 9mm RIA that would not feed even FMJ ammo without frequent jams and an easy feed ramp polish solved the problem.