Seating Die
Quote from Reloader on December 3, 2014, 2:37 pmWhen I run the cases through my press and the bullet has been seated I can't get the same length on all my completed rounds, they very constantly. I don't understand. Is it because when I trim my brass there not all the same they very a little here and a little there? Or, is it something else. I'm wondering if the bullets themselves are not exactly the same length? When I trim my cases I try and make sure they are close to exact length required by the book. I use a Lee cutting tool in my drill and a case trim tool that is supposed to cut them to length. So, any help would be greatly appreciated.
When I run the cases through my press and the bullet has been seated I can't get the same length on all my completed rounds, they very constantly. I don't understand. Is it because when I trim my brass there not all the same they very a little here and a little there? Or, is it something else. I'm wondering if the bullets themselves are not exactly the same length? When I trim my cases I try and make sure they are close to exact length required by the book. I use a Lee cutting tool in my drill and a case trim tool that is supposed to cut them to length. So, any help would be greatly appreciated.
Quote from Reloader on December 3, 2014, 5:03 pmIs it the C.O.A.L that varies? Variation in case trim length should not effect COAL. By how much does it vary? Jacketed or cast? What caliber and bullet. With some rifle bullets I have seen variations in the ogive and the tip result in COAL variation since the seater contacts somewhere on the ogive, not the point. This is usually less than .001.
If cast it could be lube build-up in the seating die. Are you consistant in how you bottom out the seating stroke? Lots of possibilities...
Is it the C.O.A.L that varies? Variation in case trim length should not effect COAL. By how much does it vary? Jacketed or cast? What caliber and bullet. With some rifle bullets I have seen variations in the ogive and the tip result in COAL variation since the seater contacts somewhere on the ogive, not the point. This is usually less than .001.
If cast it could be lube build-up in the seating die. Are you consistant in how you bottom out the seating stroke? Lots of possibilities...
Quote from Reloader on December 4, 2014, 11:54 amyes it is the C.O.A.L. that varies and yes its a Jacketed bullet .223 Hornady FMJ-BT/Cannelure. My strokes are complete from top to bottom every time. The variation could be from well the book states O.A.L. 2.200 and it can vary from 1.8 even go above O.A.L. 2.275. And I'm a guy that wants everything exact i'm a nut to when it comes to that. Thanks for the help I love the machine the idea of making my own loads but this is driving me nuts.
yes it is the C.O.A.L. that varies and yes its a Jacketed bullet .223 Hornady FMJ-BT/Cannelure. My strokes are complete from top to bottom every time. The variation could be from well the book states O.A.L. 2.200 and it can vary from 1.8 even go above O.A.L. 2.275. And I'm a guy that wants everything exact i'm a nut to when it comes to that. Thanks for the help I love the machine the idea of making my own loads but this is driving me nuts.
Quote from Reloader on December 7, 2015, 1:33 amRan into same issue running Unique powder in 9mm cases. Loading at 6.2-6.3 grains nearly tops out the cases so wondering if it's a compression issue (doubt it). Case size shouldn't affect c.o.a.l. Actually pulled the die and reinstalled and still varies btw 1.68-1.77 or so. Checked my digi caliper with mechanical RCBS caliper and they read same. Don't remember having this size fluctuation with other powders but have had no issues at the range.
Ran into same issue running Unique powder in 9mm cases. Loading at 6.2-6.3 grains nearly tops out the cases so wondering if it's a compression issue (doubt it). Case size shouldn't affect c.o.a.l. Actually pulled the die and reinstalled and still varies btw 1.68-1.77 or so. Checked my digi caliper with mechanical RCBS caliper and they read same. Don't remember having this size fluctuation with other powders but have had no issues at the range.