Is the crimp die in this set a "taper crimp" or is the tc another component?
http://www.midwayusa.com/product/146834 ... uctFinding
Moderator: MudBug
Midwayusa page for product #146834 Hornady 450B dies wrote:Notes:
- Seating die features seater adjustment screw, built-in crimper, and locking retainer spring
- The crimp die and is intended for a deep crimp which may be required with heavy cast bullet loads.
- Features Hornady's No-Risk Lifetime Warranty
- Hornady Suggests Spraying all metal parts with Hornady One Shot Gun Cleaner-Degreaser and Dry Lubricant before using the dies (Sold Separately Item# 270-323)
Jim in Houston wrote:Set up the seating die WITHOUT CRIMPING. This means that when you set it up to just contact an empty shell with the press ram at full stroke, you then back it off about one turn. The instructions are pretty clear on this. Then use the separate crimping die to put in the taper crimp (to .474 or .475). You will not need the expander die.
Jim in Houston wrote:If you use the seating die to crimp, you end up with a roll crimp, which is not good for the 450 BM. The reason for this escapes me, but it is on the forum somewhere.
Bushmaster1921 wrote:Hello pitted bore when loading with bullet seating die how do you adjust not to get roll crimp,wasn't quite sure on how to not get rollcrimp,
Hoot wrote:Not sure if this happens to everyone or just me. If I slowly walk a bullet in by repeated adjustment of he seating stem and reapplication of the ram until I reach the desired COL. Having reached that point, if I lock it down and then seat the next bullet with a mostly continous stroke of the ram, the resultant cartridge and subsequent ones usually wind a up a little too short. I suspect that seating in fits and starts results in more resistance and springback as opposed to a continuous slide. There is also a correlation to caliber as this is much less pronounced in smaller calibers.
To combat this phenomenon I set my initial seating to come up a little long, say +.03 producing a cartridge that measures 2.29 COL when my end goal is 2.26 .
As my barber is fond of saying I can always take a little more off but putting more on is a going to take a while.
Anyway, after locking the stem down with it seating a little long, I seat the next round with the more continous stroke like I'll be doing the rest of them using and remeasure the COL. Some times it's spot on then, but that's mostly a matter of luck. It will provide you with a coefficient that you use to judge preliminary seating setups going forward. It sure beats having to tap the bullet out to the correct COL with an inertial puller.
Then again, it could just be a phenomenon that happens to me.
Regardless, there is always room in any process for a little improvement.
Hoot
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