Case bulge???
Quote from Reloader on March 27, 2017, 4:00 amI am reloading 9mm on my Square Deal B. After getting it touched up from Dillon (bought it used) I noticed there were some things moved around, mainly the powder funnel and seating die in my 9mm and 38/357 die plates were changed out (i.e half the parts in each belonged to half the parts in the opposite caliber). Well, got things rolling. Still having about 5-10% of my primers not seating properly or at all. But I'll work out what's wrong with that later (initially not seating at all! Found it was the plastic retaining thing at the bottom of the primer tube being crushed in all the way, pried the 2 arms apart and primers could flow again).
The real issue that I am stumped on is a middle, inward bulge in my casings. Basically the middle is ever so slightly narrower than the base and the mouth on the cartridge. I can't make heads or tails of it. I'm using 4.5gr of Titegroup for 124gr 9mm and an O.A.L of 1.125-1.140. Why the length variance? I've noticed that different manufacturers of bullets produce different O.A.L, consistently. I set up my dies using Winchester brass, it always gives me 1.135. PMC brass gives me 1.130, Federal gives me 1.125, and foreign brass like PPU gives me 1.140.
The ammo loaded shoots ok. Sometimes it seems like the bullets keyhole? Is that even possible with pistol rounds at 25 feet? About 1/100 shots seems to make a bigger hole than the rest and it's usually early on. I reload in batches of 1000 and the thing pops up sporadically.
I know that 4.5gr of Titegroup is 0.1gr over the max load but the recipies in 4 of my books said while 4.4gr was the max, they had an O.A.L of 1.15-1.35 and I am well within those parameters. Pressures look good. No abnormalities in the mouth rim nor does the primer look flattened. These rounds shoot softer than my self defense loads of Federal HST 124gr +p, and they shoot almost the same as my favorite Winchester 124gr NATO rounds (I actually used a box of IMI 9mm 124gr NATO at the onset to compare but I've shot 2500 rounds of the Win Nato in the last 8 months).
So, why the uniform inward bulge in my loaded ammunition?
I am reloading 9mm on my Square Deal B. After getting it touched up from Dillon (bought it used) I noticed there were some things moved around, mainly the powder funnel and seating die in my 9mm and 38/357 die plates were changed out (i.e half the parts in each belonged to half the parts in the opposite caliber). Well, got things rolling. Still having about 5-10% of my primers not seating properly or at all. But I'll work out what's wrong with that later (initially not seating at all! Found it was the plastic retaining thing at the bottom of the primer tube being crushed in all the way, pried the 2 arms apart and primers could flow again).
The real issue that I am stumped on is a middle, inward bulge in my casings. Basically the middle is ever so slightly narrower than the base and the mouth on the cartridge. I can't make heads or tails of it. I'm using 4.5gr of Titegroup for 124gr 9mm and an O.A.L of 1.125-1.140. Why the length variance? I've noticed that different manufacturers of bullets produce different O.A.L, consistently. I set up my dies using Winchester brass, it always gives me 1.135. PMC brass gives me 1.130, Federal gives me 1.125, and foreign brass like PPU gives me 1.140.
The ammo loaded shoots ok. Sometimes it seems like the bullets keyhole? Is that even possible with pistol rounds at 25 feet? About 1/100 shots seems to make a bigger hole than the rest and it's usually early on. I reload in batches of 1000 and the thing pops up sporadically.
I know that 4.5gr of Titegroup is 0.1gr over the max load but the recipies in 4 of my books said while 4.4gr was the max, they had an O.A.L of 1.15-1.35 and I am well within those parameters. Pressures look good. No abnormalities in the mouth rim nor does the primer look flattened. These rounds shoot softer than my self defense loads of Federal HST 124gr +p, and they shoot almost the same as my favorite Winchester 124gr NATO rounds (I actually used a box of IMI 9mm 124gr NATO at the onset to compare but I've shot 2500 rounds of the Win Nato in the last 8 months).
So, why the uniform inward bulge in my loaded ammunition?