Re: Need Help - Sticky Bolt
If you are using a Redding body die... that is an FL die first off, it just doesn't touch the neck portion. The Bushing neck die will take care of that part. It's cut to the same dims as an FL die is.
You don't by chance have a normal Redding FL die for it too do you?
A side note; With .013" thick necks, it may work perfect without using it's expander ball "now." You can theoretically actually increase RO (runout) just using a body die, a die that does the neck and body at the same time won't allow the neck to move over if one side's weaker than the other, hense Reddings FL bushing die. This is where FL sizing has an advantage over NK sizing. If you monitor the RO numbers before and after doing both, you'll see what I'm babbling on about... because it doesn't have anything to do with your problem here though. [img]images/icons/grin.gif[/img]
I believe what I said before concerning NK sizing holds true, "if" you happen to NK size and "don't" bump the shoulder back.
I forgot that you said you used the body die before loading these up. Assuming the body die is set up correctly for minimal headspace, once you "again" size these hard to extract cases you may find they "still" don't chamber easily. These would be good cases to use to set up your body die for minimal headspace, if you haven't already sized them all again. You may have to actually set the die "lower" than it already is to get them to chamber again, a little "cam over" action is "sometimes" what it takes. I set the die down in 1/16 turn increments until they "all" just chamber perfectly, then lock it down there. Cases usually get noticably harder or impossible to chamber right before they finally go in easily.
It's interesting that you're using Retumbo too. With the 300 Ultra, I had "early" hard extractions with top loads using the stuff myself, that's why I asked. Have you used RL25 before and compared MV on your top loads with each? I found RL25 went to 70k psi on the Oehler without any difficult extractions, Retumbo started showing them significantly at just 63k psi though. I could never reach the top loads recommended for Retumbo, pressure would have been way, way high. I have some more testing coming up with Retumbo though. So far, I have gotten a 220 SMK to an even 3000 fps with RL25 at right about 67k psi with exellent accuracy, Retumbo got me to 2920 at 63k psi where extraction became very difficult, accuracy wasn't there at that load level.
Like S1 suggested, the 210's may give you lower pressure at the same velocity.
If your loads are causing stiff extraction, when they chambered easily in the first place, they just simply need to be reduced.
For some reason Retumbo seems to batter up cases at lower pressures than RL25 does at higher levels... this is what I find very strange and will look into further. I wish more people had strain gages hooked up to their barrels and could help draw some serious conclusions about this powder in several cartridges.