No doubt at this point thats its a factor. I may try . Restricting hunting loads to 180gr just to reduce muzzle flip. The Barnes 155 might be a consideration, but theyre kinda proud of them, at least for practice.

FT-Feed, I understand. But anyhow the trial of 10 rds with the Talon Grips installed was inconclusive. The first was fine the next two showed the fast slide slow magazine malfunction. I changed the position of my grip a bit and the rest of the ten rounds fed as expected. May be a side benefit that the group size may have been a tad better with the talon grip. This is better than the results I had a few weeks ago when I started this thread. At that point I was seeing about 50% failures.

THE last trial was controlled and only 1 failure. I received a "granular" texture Talon grip and Im going to apply it later and try it out. I can cut my fingernails with it when Im not shooting.

the other side

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 49's, Heres the pics, hope theyre helpful.

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49er what aspects or views are pertinent?  Field stripped or just profiles.?

Gator, I have a Redhawk 45C that is 100% and things happen at both end of the gun, 300gr at over 1350 is to be respected.

Well, scrubbed every trace of lube out of the pistol and hid the tubes from sight.Replaced the stock RSA and ran a mag full. I had one failure and on that one I could see a higher than normal muzzle rise. I believe this was due to a shift in grip. Part of the mag was sent off with one hand w/o problem. So it looks like the muzzle rise is the culprit. I think the chain of events are as follows. When new the gun was stiff and awaiting break in. After a few hundred rounds things were smoothed up to where the function was faster to the point where as it got faster the FTFs got closer together. Cleaning and lubing with quality lubes just made the situation worse. The slide could just move so fast the top round couldnt get back , after muzzle lift/flip, to get picked up by the slide. Time will tell as we shoot abit more, but it seems promising. Meanwhile Ive ordered a set of Talon rough grips.
    Thanks

Well Ive figured it out or so I think. I shot my sons G20 and had 2 out of 15 FTF. My son has stippled the grip frame of his pistol and this results in a smaller rough grip. When you clamp down on this grip the pistol doesnt move too much in your hand. Mine has a Hogue sleeve on the grip.I believe the pistol moves a tad more in muzzle lift with the fire breathing loads and the sleeve allows a small amount of movement. This with the heavy bullets causes the rounds in the magazine to tip slightly downward due to the heavy bullet and muzzle lift. Meanwhile the slide cycles and the magazine spring cant push the case back up fast enough and it catches the case above the rim causing the jam. A stronger magazine spring helped marginally but didnt eliminate the issue. I found if I forced my grip to where muzzle lift was minimal the pistol fed normally. Next step is to remove all the lube and use the softer spring to see if slowing the slide down will improve the function.  This is why the softer loads fed normally, slower slide motion.

We, I got my son to shoot the G20 and he ran a magazine full without a hitch. The first round I fired followed up with a FTF.  We think my hands are big enough that I may be depressing the mag release under recoil or something similar. He was able to get some  FTf with limp wristing. I guess Im going to have to try some grip variations to see if it will make a difference. Im going to try shooting his gun to see if that makes any difference. At least Im going to get to shoot a lot.

There are a few that hang nose in the chamber and the head of the case is stuck halfway up the bolt face- I think that might be the factor here. The vast majority have the nose of the boltface stuck on about the rear 1/4 of the loaded round.  Iam Ill admit reluctant to open the chamber unless theres no recourse. Cases are unbulged regardless of load thusfar.

Limp wristing should be worse with powderpuff loads, just the opposite here especially with the 24# spring. The last run was  with 180gr at ~1100  or abit less. Function was perfect. Im shooting 2 handed and to get perspective, the grip even with the Hogue sleeve is a tad small for me. The slide seems to ride past the case in the magazine before it can rise up to meet the boltface. Ill get my son  to volunteer to shoot mine, but I have doubts.

Gen 3, also an SF purchased the same day at the same gun shop, . I dont believe hes ever shot mine.

I have been working with this G20 for several years and have been having problems withFTF. This started at about 200 rounds and the simple process of cleaning the magazines and dry lubing them solved the problem for about 100 rounds. Then it started again. Cleaning and lubing made little change. I believe it has worsened over time. The loads in question are the accepted 800X, PP, Longshot, BD and #9 loads at max(180gr @1330; 200gr @1275). I have tried a LW 6.02" barrel, 22# and 24# recoil springs. also tried a recoil damper pad at the head of the RSA. I have replaced the mag springs w/ Wolff 10% heavier tension. Shooting 180 gr @1100-1150 it feeds and fires without a hiccup. Almost all the FTF are caused by the slide riding up on the case ahead of the rim/extractor groove, this leaves the nose of the bullet trying to enter the chamber. A lesser number are with the round partially entering the chamber but the case head has not slid up the bolt face, slight retraction of the slide and it pops right in. I have polished the bolt face and dry lubed it. No good. Ive tried adjusting OAL from 1.250" to 1.270". Full power loads FTF about 1/2 the time. Moderate power loads feed w/o a hitch. Length seems to have little effect. Ejection of fired cases is about 8' for for factory equivalent loads in a 2=3' pile, the full power loads are about 12' and a bit more scattered.
      Rounds in the chamber seem to angle a bit towards the left side of the chamber, I dont now if thats normal or not. Ive checked the slide and frame for any sign of cracks or deformity and nothing seems out of wack. There doesnt seem to be too much difference with the stock RSA or the 22# or the 24# RSAs. It does get to be a chore to work the slide with the 24# spring.. Bullet choice seems to make no difference whatsoever.. My son has the twin to this one and he has no problems at at even with my ammo. Its getting a bit frustrating. What Am I missing?

My G20 likes the Sierra 180 and Longshot. Im wondering if that bullet is safe/effective to use on whitetail or similar sized hogs. I havent chron'ed  the load but the same charge w/ 180XP was a bit over 1330. I just wonder  if the bullets too soft at that velocity. MD requires 700 FPE.