Posted: 2/7/2011 7:09:41 AM EDT
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I am trying to correct some feeding Problems with my new production Delta. I am running a 24# single spring with Tripp 9 and 10 round Cobra Mags. The process has been slow because inconsistent reloads prevented me from isolating other variables, but uniform OALs well below spec maximums gave the same issues.
Problem: Occasional FTF, frequent FTF while reloading, both via slide release and slingshot. slide release is more problematic than slingshot, 10 rounders are a constant problem, whereas 9s hang up occasionally. 9 & 10 mag catch holes are same size but 10s have a lot of up/down play in the magwell (due to floorplate stop tab placement). On a 10rd FTF, I can slam the basepad with the heel of the hand, which moves the weapon into battery. also, i am getting nicks/gouges in the side of the casings. Tripp suggested the mag catch or barrel/ramp profile was the issue. They offered to refund, replace 10s for 9s or they would be willing to charge for profiling the barrel. I want both 9s and 10s to work (using 180gr JHP), so I am more interested in addressing the gun than replacing or trying other mags. Pics posted below. What do you think? 
These are the typical nicks/gouges in the casings. 
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This is a new production model (bought new). It ran fairly well in stock form considering (had small batch of handloads: 100-150, and factory mags had to be returned due to defective floorplates, which bent outward after a few insertions until they would over-insert). I do not recall if there were any more than a mag-related malf or two on each of the initial two runs. After the second run, mags and spring/guide were replaced.
The factory setup is a dual spring package with combined 23# weight. Replacement is a USGI spring guide (Ed Brown, IIRC) and 24# spring. Colt replaced the factory mags, which remain NIW (not interested in repeating the floorplate woes, and the Delta has a magwell, so flush-fit are out as a long-term option). 
Pics of the floorplate bends added. |
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Is the barrel all the back back against the VIS in those photos? You may be looking at having to have the feedramp machined deeper, just judging from the copper marks at the bottom of it.
How is the cartridge oriented when the malfunctions occur? (nosedown, halfway in, jammed against the roof of the chamber, etc) |
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Quoted:
Have you checked the extractor tension? I don't recall excessive tension, though I don't have any qualms about re-examining later tonight. Quoted:
Is the barrel all the back back against the VIS in those photos? You may be looking at having to have the feedramp machined deeper, just judging from the copper marks at the bottom of it. Yes, the barrel is held firmly in place by a rubber band in all but the last photo, so that I could take photographs with 2 hands. You could be right about the machining, though some of the marking may be misleading, due to some early handloading and OALs... doesn't rule your suggestion out by any means, however. How is the cartridge oriented when the malfunctions occur? (nosedown, halfway in, jammed against the roof of the chamber, etc)
Sorry, the first post was by mobile and I was more preoccupied posting pics. FTFs are nose jammed against the chamber, or IIRC nose burried in the ramp/bottom of the chamber with the bottom of the breechface catching the top edge of the headstamp (slamming the mag home clears the jam and chambers). |
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This one's a little beyond me, but the feed ramp gap does appear to be a bit excessive. I'd start with the extractor, try one of the factory mags again just to eliminate the Cobra mags (I don't really think it's a mag issue) and then have a gunsmith that knows something about the 10mm in a 1911 look at it.
The more I look at the pictures, the more I think it's a feed ramp issue (as previously mentioned). |
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Quoted:
Pulpsmack, we did a feed problem on a Delta Elite last week in reloading forum. His problem was oal related and extractor issue. I kind of remember when you bought your Delta. It feeds factory ammo alright, doesn't it ?? Posted Via AR15.Com Mobile Been having some problems hand-cycling factory JHP |