I check everything in a Sheridan case gauge, I'd hope it wouldn't let something like this fit?
it does if im wrong or premature.
I think so, that should do it. I figure from now on when I order bullets I will just mic 10 samples from the box, or 1 sample each time I do a load session.
Yep. That's what I gauge everything off throughout most of my brass prep and loading. Of coarse a caliper is used as well. But it is a second form of verification that is super handy.
That's correct. It's due to bullet profile. A longer bearing surface that causes the bottom of the ogive to interfere with the lands. Making it necessary to seat bullet deeper. I presume the same can happen with rifle bullets?
I don't know how the Barnes copper bullets are made, they do not look CNC lathe turned they look pressed or molded.
I think its the same with rifle bullets. My understanding is that saami doesn't regulate ogive geometry. But they do specify chamber dimensions... so its odd any bullet company would make a bullet with an ogive that would interfere with the rifling leads before coal is met.
Oops, I think I thought that Barnes was the one in question? Or have you not stated the culprit manufacture yet?
I havent stated the ones in question yet. The Barnes was just one sample I found in the box, the rest of the box is good... I just thought it interesting to find.
Are you speaking of minimum or maximum COAL?
I was thinking of maximum. At first I wasn't certain what Mike was describing but I can see how some bullets might need to be seated deeper as long as they don't exceed the minimum coal.
What's minimum COAL? All I see in my resources, (Hodgdon, Lyman 50th and Speer #14) the data is a single COAL, and pressure, and velocity numbers, in their test gun/barrel.
Several of my reloading handbook resources only show the maximum COAL, but SAAMI has a minimum as well. If you go to the SAAMI website and just pick one of the calibers they've updated, you can see (for free) where they have a minimum and a maximum COAL.
There is a min-max range on the SAAMI specifications drawings. For example, per link: 2.775 minimum to 2.955 maximum
You did a much better job of saying what I said, plus bonus points for the attachment.
Okay. But that is just a range to use. Different profile bullets only need to fall in that range. And we're talking load data, not cartridge dimensions. It is my understanding the the real serious, long range accuracy shooters, fiddle a bunch with COAL. Up to having the bullet touching the lands even. Always keeping pressures in mind and watching for high pressure signs.
SAAMI is a "voluntary" standard, to assure ammo will safely work in any saami spec gun chamber.
TBH I've never really looked at minimum COAL when loading, but I've usually loaded somewhat close to maximum. I have recently been wondering about certain wadcutter bullets that seat to where the bullet is barely sticking out of the case. If you look at Buffalo Bore .44 Special loads that they label "Anti-Personnel" for instance, they are barely above flush with the case. I've got some similar commerdial handloads with the same wadcutter bullets that I'll have to dig out and measure to see if they meet the SAAMI minimum COAL of 1.415. These particular rounds shoot great out of my S&W 629 Classic. I was considering reloading some for myself and figured I would need to back the powder off due to most of the bullet being down in the case. Ultimately, I got a good deal on some Nosler jacketed hollowpoints and will be working up a load for those instead.
Well, I believe with regard to COAL SAAAMI has established maximum OAL lengths (such as 1.169 I see for 9mm) - but no minimum.
