For your remaining failure to feed problems, before using the new barrel try polishing the feed ramp on your current barrel. Slight imperfections might be causing the hang ups and doing this may help. A bit of polishing compound and some elbow grease is all that is needed. Since you already have a barrel on the way, you really have nothing to lose and can only gain your money back if successful or at the minimum gain a bit of gunsmithing knowledge. Also if you haven't done so, try a new magazine from a quality company as many of the less expensive magazines cause these problems too. As also mentioned, bullet design may have an effect too. Hollowpoints, especially the 200 gr Speers, often have problems feeding and may take a lot of work to get them to function properly. Run various 230 gr hardball ammo and if you still have trouble, take to a gunsmith who has knowledge of 1911s for an opinion. This will save a lot of time and money buying and replacing parts until it works, if ever. You could have a fitting problem which can be a very labor intensive and expensive proposition.