AHI

You are welcome Reading comprehension is very low as of late on this sight. Dillon has a quality issue on small parts the last while . Glad I could help.

FOLLOW THE LINK LOOK ITS RIGHT THERE.

Back the crimp off and start over. Over crimping actually can / will make the bullets looser.

what press do you have this on? Where you have the bolt is supposed to have the failsafe rod. The rod pulls(lack of a better term)when you return the handel up. This sticking is normal(a safety feature) Old style Dillon powder measures that used the spring you have did not have the tab you have the red arrow pointing at. To use it (powder measure)on a non Dillon with out the rod you would need to remove the tab the read arrow points at. old style

Pick one you can get parts for later. (firing pins ,extractors, springs,etc) Other than that what buffer system you pick may make a difference.

Load them up.

match grade air rifle pellets weigh 8 grains .

I would go with the 34mos has a better balance fill to me. Ever so slightly muzzle heavy ness.

SO when did GSSF change their rules to allow non Glock guns to be used ?

http://estore.beretta.com/en-eu/beretta-picatinny-rail-for-1301/tx4/ lines up 100%

Not normal for a PCC . look at your firing pin tip it may be bent thearfor sticking just enough to mark the primers.

Are you shooting at a paper or cardboard target? Unsupported paper will look like the bullet is tumbling.

Hard to see in your picture but looks to me that you have aluminum and steel cases mixed in with brass .

Just set up 2 presses for some friends both had issues with fail safe rod. The bends are off. They need to be 90 degree bends . they were not. A little time with pliers and a vice fixed both . But I had a good rod to go by. This may be your issue.

Most 2011 style guns have the slide stop deactivated for one reason or another. Your RI falls in this category. Mags are inserted with the slide closed mostly to prevent over insertion . So when your MBX magazine is inserted with the slide closed does your issue go away?

6 years old

If the shell plate is tight . If the size die is screwed in till it makes contact with shell plate. There is something wrong with the die. ( IF) Try screwing the die it till a very slight cam over is felt.

Is there more freebore on the KKM barrel? The one I have you could load 147 SNS RN longer than will fit in magazine.

sence you are using a STI you should be able to load 1.160 to 1.170 length. Look at 9x21 load data to get a idea of what you need to do. Go slow use a chronograph

What press?

What buffer system? Sounds like your bolt is opening to soon . May be time for some new springs.

Time until its your turn to shoot. Depends on squid size. The stage your gun broke on 2 min. How long will it take you to replace parts vs get back up gun?

Are you reusing the denatured alcohol?

Have seen this Fed primers are very soft . If you need convincing try some Winchester small pistol primers.

crimp is not your problem . your powder is /was contaminated with some thing. How do you clean your brass? Do you lube your brass?