Home Forums Reloading Varmint Rifles Believe found the bullet seat problem......

.....seated five Nosler with larger .224 seating stem. In RCBS Die. This an old stem had them make for me, (don't even remember why), took a while to find it. Think this was set up for a Sierra of some kind. Don't remember dimension, but will almost fit to shoulder of bullet (.224 Nosler 40 gr.)

Still same seat problem, with the exact same variance of .015.

Took all dies apart, FL and neck. Only difference in measuring, is the Redding sizer, had a neck sizer measuring .220. This is the hardened sliding button type neck sizer. All other neck sizer buttons run .222. My prepped brass was full length sized with the Redding die and the sliding button sizer.
The prepped brass has outside turned necks, only difference between it and other .223 brass for plinking and playing.

Reinstalled the old style neck sizer in the Redding FL die. Sized five regular brass, seated five more of the 40 gr. nosler in the empty cases.

Bingo! OAL on ogive within .001, which is what the bullets themselves measure on variance, and right on the OAL where they are supposed to be.

What the heck is going on here? If I bother to do a concentric measurement on seated bullets, what should I see if anything?
The old style neck button is a .222.Anyone make sense of this. Think I can go through and resize my prepped brass with the old button. Do the carbide sliding buttons ever get "broke" or out of whack?

Ah...you are squishing brass and moving brass by stuffing bullets in the 220 diameter necks.

I use Type "S" bushing dies so don't have to worry with an expander ball but I would chek the inside of the seating stem for contact with the plastic tip.Rick.

Got an idea on how to get the five dummy cases unseated, that did the variance thing, without screwing up bullet shape. I KNOW they were .001 on ogive because measured them before seating. Am thinking that cam pulling in press should show a differnce in diameter of, and maybe elongation, because I happen to have measured tip to base also and that measure is plus or minus .001 for all ten of those bullets.

Common sense (what I have of that), tells me what you said only thing possible, but NEVER have heard of it, where the bullet wasn't deformed to point of visible.

Checked all three seaters used and no clearance problem with Ballistic Tips.

May be getting the type S set-up if this shows up anymore. Like the Nosler Ballistic Tips, for me seem to hold just tad better than Hornady's for the wind thing. But, we are talking barely measurable over 300 yd distance. My shooting is a bigger problem at that distance than an inch or two of wind drift.