Re: seating consistency problem
I know what your problem is straight up!
Your neck tension is insufficient!
What's happening is, when you seat the bullet, the seater plug is grabbing/sticking on the bullet and pulling it partially out of the case as it's being withdrawn from the die. The compressed powder isn't helping either, but if you increase the neck tension, the problem will go away!
77gr's of H1000 is not an overly compressed charge, but it will still put a bit of pressure on the base of the bullet.
You can also 'swirl' the charge into the cases using the pan from your scale and a powder funnel, this will give more room for the bullet in the case, and will most likely improve accuracy due to tighter packing scheme of the powder.
I have this problem with my 300WM when the brass is freshly annealed, I use 2 different expander plug sizes, 1 .002" under bullet dia. for normal cases and 1 .004" under bullet dia. for newly annealed cases.
I also use a bushing die with different bushings for the same reasons above. Depends on which rifle I'm loading for, hunting or F-Class.
Last edited by MagnumManiac; 09-28-2009 at 02:36 AM.