Seems that some of my reloaded rounds don't fully chamber in my CZ 75B. There is a very slight bulge on the case on one side just below the bottom of the lead bullet which I assume is preventing the round from fully chambering. Any ideas what I may be doing wrong? Any info would be great. I'm using Lee Carbide Dies. Thanks
Problems Reloading 9mm
- Thread starter SUPER TENERE
- Start date
75s are known to have tight chamber tolerances. My pre-b was fickle that way.
You might want to consider purchasing a factory resizing die. I run of all my 9mm reloads through the resizer die.
Are you using new brass or range pickups?
Can you post an image of the bulge you are seeing?
M
You might want to consider purchasing a factory resizing die. I run of all my 9mm reloads through the resizer die.
Are you using new brass or range pickups?
Can you post an image of the bulge you are seeing?
M
Had to seat my .357 cast LCN bullets to 1.080 for them to chamber properly in my cz75. Otherwise if I ever tried to clear a live round, it would sometimes rip the bullet out of the case. It's a mess. The odd one wouldn't chamber completely as well. Causing a jam.
- Location
- West Quebec
Are you checking your rounds after loading with a guage?
A bulge on one side of the case only, right under the base of the bullet once it's seated and crimped in the case??
I'm a total newb on reloading, but could you see whether that bulge is present before you size the case, or expand/bell the case, or seat the bullet or crimp the case? If you determines it appear somewhere during the reload process, you'd get a clue as to the cause by looking at what the last step performed was?
I'm a total newb on reloading, but could you see whether that bulge is present before you size the case, or expand/bell the case, or seat the bullet or crimp the case? If you determines it appear somewhere during the reload process, you'd get a clue as to the cause by looking at what the last step performed was?
A bulge on one side at the base of the bullet can be caused by the bullet being slightly tipped when being seated.
It is useful to remove the barrel from the pistol, and drop each and every round into the chamber. They should drop in, fall out.
It is useful to remove the barrel from the pistol, and drop each and every round into the chamber. They should drop in, fall out.
Thanks guys. All good info. My Hard Cast Lead is .357 diameter. Problem happens when I seat the bullet. Prior to that the brass is perfect. Brass is a mixed bag of range pickups but all in good shape most being only once fired. tiriaq. I think you are closest to the right answer. Wish I didn't have 1500 loaded rounds. I checked 20 of my reloads before I loaded all those and they worked fine. Guess I'll have to individually chamber check each one. Anybody want to make $5. an hour?
Watch out for the range pickups. Some Glocks leave a bulge near the rim that will mess you up. You need a special die to eliminate that bulge.
My pre-b would not tolerate them. It would lock up hard if you chambered one (as in get the squib rod out). I cull those when I factory resize my reloads and feed them to my M&P.
When it comes to 9mm, the factory resizing die is a must have.
M
My pre-b would not tolerate them. It would lock up hard if you chambered one (as in get the squib rod out). I cull those when I factory resize my reloads and feed them to my M&P.
When it comes to 9mm, the factory resizing die is a must have.
M
- Location
- Banana Republik of Kebekistan
9mm bullets commercially available for reloading have .356" dia. The extra thou you are reporting could be an issue not helping your case (no pun intended). That said, I know absolutely nothing about hard cast lead and I may stand corrected very shortly... The way I see it, the brass at the mouth of the case is likely stretching out a bit too much when seating, worse if the bullets are not sitting straight when seated.
Interestingly, a bulge at the base (rather than the mouth) is a common thing and also causes rounds to not seat fully. This is because the chamber of some guns do not fully support the shell on most of its length. An expansion of the unsupported portion of the case (the base) is a common occurrence. As someone hinted before, a cheap and smart investment is the Lee factory crimp die: in addition to a good crimp (if well adjusted) it full length re-sizes external diameter back to factory dimensions.
Rather than fixing the effects, I find wiser to fix the cause: try .356" dia bullets and see if that fixes the problem.
Using Bullet Barn/Bullet Bench 9mm 124gr lead bullets which are high quality. Pretty sure my Lee Die is a Taper Crimp. Will try a Factory Resizing die. I'm again assuming this is a die which you use on a completely loaded round resizing the whole thing. The small occasional bulge I'm getting is just on one side of the round. I don't think .357 is too big for 9mm. Thanks again.
I have had this issue but mainly with .45ACP. The trouble I had was when using Lee dies you seat the projectile and crimp it in the same die at the same time. If the die isn't setup perfect you get this bulge. What I did is buy a separate crimp die so doing one step, seat the projectile and next step crimp the projectile. I also had to flare the brass more than I was before to assist the projectile to seat well. The other thing I did was buy a tester. Basically if the complete bullet fits in this tester than you should be good to go. It sounds stupid afterwards but that was the fix for my issues. I had this issue with 9mm and .45ACP mainly.
.357 IS a good fit for my cz75 barrel using cast bullets...
You need to slug your barrel and go at least .001" bigger. .0015" is fine too.
OP, What shape of bullet are you using? Is it the bullet or the brass hanging up?
.357" is an appropriate diameter for lead bullets for the 9mm. Many 9mm pistols have groove diameters larger than the nominal .355" and thus must use larger diameter bullets to prevent heavy leading and/or tumbling. I would be hesitant to use a Factory Crimp die, as it will size down lead bullets, possibly to the point of being undersized for your barrel.
I can tell you without a doubt that the .357 will be FINE in the CZ. 2 guys I shoot with cast them to that size for 75 Shadows and a TS. I bought the gear to cast my own to that size once spring rolls around. Currently I use a .358 DRG lead 38 bullet in my 75 Shadow.
Most 9mm like Campro are only .354 or .355.
Most 9mm like Campro are only .354 or .355.
