At first glance, I thought buying the Sinclair Concentricity gauge was a good idea, now after checking some cases I think I'm either looking crosseyed at it, or I have a major problem with my .257 Neck Sizer. :o
Or me. Not that THAT has ever happened before !
Actually, I really believe that the gauge will be a good thing in the long run.
I first checked some Wby brass that I shot in my Vanguard, that I had neck sized only and got a pretty consistent .004" runout. The neck sizer is a RCBS P/N 12630. O.K., maybe it's the gun, right? So I checked some new Norma brass (again .257) that I had neck sized, but not loaded or fired. Same runout. What the heck??? I gotta be doing something wrong on the gauge. So I pull out some new .338 Lapua brass. .0005 to .0015 runout. So, it's not me. I grab some new not touched Norma .257 Wby brass and check that - .002" runout.
Some fired .300 Win Mag brass reads in the .001" - .002" range.
So, what the heck am I doing wrong???? HALP ME PLEASE!!!!!!!!!!
2 Yr. old Rock Chucker Superme press, the above mentioned neck sizer. I clean (tumble) all the brass before running it thru any dies. I give the inside a dip and then a brush with mica, then give the outside a light coat of Imperial (drag my finger across the Imperial, swirl it around the neck, then size), then run it thru the sizer. I'm running the sizer down the neck between approx. .285".
I just checked some loaded rounds from last year. Bullet runout is .005"
I'll try and neck size a couple by rotating the case a few times and hitting it multiple times, and try it by hitting it once with the button in it, then hitting it again with the button out. I'll be back shortly! But in the meantime:
Oh masters of reloading, what sayeth thou???
O.K. I'm back. It seems that it's me. I tried re-sizing the ones that are bad to see if I can change any of the readings.
The first 2 that I did rotating the cases resulted in .002" and .006" runout. So the next try I removed the button but put it right back in because it was about 4 turns loose on the shaft. :o:o:o These next 2 were .0015" and .0025". Just for giggles I removed the button and ran 2 cases and got .002" and .0025. Then I ran 2 more cases but rotated them a few times and hit them a few times without the button in the die as I did the time before - .001 and .0015.
Feel free to add any advice you have, I'm all ears (the're pretty red too!)