10-02-2021, 11:18 PM
(10-02-2021, 06:13 PM)CZ527 Guy Wrote: Received the lee collet style crimp die this week I started off seating this bullet roughly .09 off jam to utilize the cannelure and was surprised to see accuracy was just fine. And yes this did take care of any concerns I had with neck tension. Dosent take much, a little additional tension with a light crimp gets us what we are looking for. Ill experiment more with seating depth and not utilizing the cannelure to see if accuracy may improve even more.
Looks like I have at least three very good bullet choices on hand for medium game with the 6mm arc
. Been very satisfied scratching this itch to have a CZ 527 chambered in a near optimum 6mm chambering for this little mini Mauser bolt action type rifle.
...FWIW, one of the ways I found works for me with the Lee collet crimp die is to run an empty, sized case to top-stroke of press ram then screw the die down until it makes contact on the casing then lock it down at that point. Once you actually seat a bullet there will be enough expansion of the case mouth that when it enters the crimp die it does enough to prevent bullet set-back when feeding. Granted, if you are looking for absolute accuracy in your loads, then neck turning before setting the die would give you even more consistent results.
If you're just loading practice/plinking ammo on a progressive, this works out very well and you do gain some improvement in your ammo's consistency, YMMV.