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Here is easy way to sort out if it is ammo vs the gun. Try to separate the upper & lower then pull the BCG out. Insert a loaded round by hand into the chamber. If it feels like it is sticking stop, don't force it in farther. It should not stick and should fall right back out. If it sticks you can easily remove it with a cleaning rod inserted in the muzzle end, and it will easily tap it back out. The cleaning rod technique seems to clear a stuck round much easier than mortaring if you have one available and is less severe on your optic. If it sticks, try the same test with some factory ammo. If only the reloads stick take a close look at sizing process. It could be shoulder set back as others mentioned or bullet run out. The scratches look like they are from the feed ramps and are likely not contributing to the issue.

I have run over 5 thousand of the Fiocchi SPP lead free in a stock Glock 17. They have run 100% for me. It is an easy way of avoiding lead exposure when possible. They definitely seat harder than Winchesters or Federals in my press. Seem close to a CCI?? No negative affects on velocity or accuracy. These are my preferred primer.

You mentioned a Glock 31 with a Storm Lake 9MM conversion. I have a lot of rounds down range thru a Glock 17 which is a 9MM with the same barrel length. I find that in the G17 I have have had much better luck with 124 or 147grain bullets compaired to the 115 grain. I would consider the Hornady 124XTP or 125HAP bullets to be very accurate in in mine with VV N320, Titegroup or Power Pistol powder. I have had better results with shorter OAL's between 1.10 to 1.13 in the factory barrel, can't comment on what would be good in a Storm Lake though.

G-Man Bart you have a valid point as I didn't have the load data that you had. Actual load data trumps a software algorithim. He mentioned being a begining reloader, it wouldn't take much bullet setback or variance in the measured charge before things got interesting with this powder so I advocated a conservative approach. On the other hand if a person can put out consistant reloads that follow published data then there is little to worry about.

Jon The chrono will not tell the whole story. The last load you mentioned is still in +P territory at the 1.09 OAL. To get to normal pressures you will have to keep dropping the amount of powder to the point where velocity suffers. If you are forced to have a very short OAL you may want to invest in Quickload (trust me is is worth it)if you are committed to using fast powders like Tightgroup. Tightgroup seems to react more in a more linear fashion when you get to OAL's like 1.125 or greater. Loaded short TG is flat out unforgiving. At short OAL's with TG there is no working up, you go from ok, to hot to dangerous in one or two tenths of a grain. There is a big difference in how this powder acts at 1.09 vs 1.125 OAL. I am not trying to rain on your parade, I just saw trouble on the horizon and wanted to help you avoid it. Another thought would be a switch to a lighter, shorter bullet which would increase the amount of combustion space in the brass. This would help a little bit. By the way a slower powder like Power Pistol which is very accurate in a lot of 9mm pistols is much more forgiving with the OAL's you are at. One last thought is ask for suggestions on the Brian Enos Factory Pistol CZ section of the forum. The CZ shooters have a lot of experience in dealing with very short OAL's and could likely help. Good luck & be safe

Jon I saw your post, noticed short a OAL and fast powder and it got my attention. Quickload came back with a pressure north of 43000 PSI on one of them which is way beyond SAAMI max. I like Titegroup along with many others on the forum, but it is a fast powder and what seems like a very small change to OAL or a .1 grain change in powder has a huge effect on pressure therefore safety. I would pull them and start over. P.S. It was shocking to me how big of deal little changes in OAL affect pressure in 9MM when you try different combos in Quickload. Even the length of the same weight bullet can be pretty significant. What kv501 said in his post is on the money.

You could try a undersize sizing die. I use a old lee carbide sizing die in my 550 and have never had a failure to feed due to sizing in a wide variety on guns. The undersize die probably reduces brass life a little, but 9mm brass is very easy to pick up off the ground. I never have to case gauge with this method.

Just wondering have you ever tried a shorter OAL for that load in the Glock 17? I have worked up the same load bullet and powder, but with mixed brass and federal primers and noticed accuracy improved as I reduced OAL with very good results at 1.12

I am planning on trying this as well. Sinclair International also sells it.

I have a feeling this this may help explain what is going on. Per Chris at cpwsa.com, I discovered this when I bought my sights from him. "All Glock model Warren Tactical and Sevigny sights are designed for a six o'clock hold with the .215 tall front, or to shoot point of aim/point of impact with the .245 tall front sight at 20 yards. Remember that Glocks and M&Ps are production guns, so there could be slight variations in each of them, and further affected by ammo, shooter tendencies, etc. M&P and 1911 sights are designed to shoot point of aim/point of impact." Link to 6 oclock hold He helped me select the correct combination for my G17 and am very pleased with the results.

I compete with a Glock 17 as well and have been working up minor loads for a while. I tried Universal Clays after a recommendation from a friend. He was having great results with a longer barreled 9mm. I tried in vain to find an accurate combination with a 115 FMJ 9mm in the shorter Glock 17. You may have better luck with the heavier bullets that you mention, but if you don't see the accuracy you expect Universal Clays you may want to try a different powder. I have had great results with N320 and Titegroup with the 17. You may see tighter groups with jacketed over plated, but the 124grn is a solid choice. Buy a few good reloading manuals, a chrono and have fun with the hobby.

I also run a Glock 17 in production. I am still on the hunt for the best practice / match loads for FMJ 115 - 124 grain bullets. I have been working up loads with Titegroup and one of my favorites so far is Winchester 124gn FMJ over 4.1 grains of Titegroup at 1.120 COL. Avg 135pf soft and accurate.

I had a good friend recommend Universal for 9mm. He has had good success with his Glock 9mm G34 and this powder. The extra barrel length (5.3 vs 4.5 inch) seems to make a difference and he has a soft, accurate load. Unfortunately I have not been able to create an accurate load for my G17 with this powder. As our barrel lengths are close you may have similar results. I have had the best results with Tite Group which is soft and accurate. SR4756 is accurate but harsh. Currently evaluating AA#5 and VV320.

I have an older Lee (plastic top knob) and a newly acquired Hornady Custom Grade New Dimension seating dies. The Lee is an in line old school die and provides ok results. I had high hope for the Hornady Custom Grade New Dimension seating die, but it is a nested design with a fair amount of wiggle between the nested sleeves. I am considering moving to a Redding Competition seating die, and see how that goes. I expand just enough to fit the base of the bullet snugly, seat, and then remove the bell with a mild taper crimp. I find that I need to seat slowly and I usually need to rotate the bullet as part of the seating process. If I seat too fast, load long and don’t rotate the brass case halfway during seating I will get run out. In other words roll the completed cartridge across a table and watch the nose of the bullet wiggle. The rest of the Hornady set is nice, but I am considering moving to a Redding Competition Seating die. This is all on a single stage press. I am not sure why it is a challenge to prevent run out in the 9mm, but when it happens your accuracy totally goes away. What dies are you using. I just tried a Hornady with a in-line seater. I have to have the bullet placed PERFECT for it to work even close to right. My Lee seating die puts everything in the case much better. I find the 9mm a easy case to load.

That link has been a good reference for some of the loads I have been using to date (after doing a reality check with my load books). The load books in general cover a specific round. Well with the power of internet, why not take it further and try to get good data on a specific gun. In this case a Glock 17 with 115 - 124 grn FMJ's. 9mm seems to be quirky enough that I am looking for some feedback from the Glock 17 shooters out there. Plus a good opportunity to get to know a few Glock 17 fans out there.