bodene 5 Posted July 14, 2013 Share Posted July 14, 2013 is there a trick or perfered method to seating flat base bullets for 223 . I prep all brass first sort by head stamp deprime and full length size , trim to length then chamfer I have done boat tail but never flat base they are 55 grain varmit nightmare extreme . just curious how other folks do it Link to comment Share on other sites More sharing options...
wgj3 Posted July 14, 2013 Share Posted July 14, 2013 Same prep you have been doing should be fine. If you see jacket slivers, you might chamfer inside of neck a touch more, but probably will be fine. Link to comment Share on other sites More sharing options...
rishii Posted July 14, 2013 Share Posted July 14, 2013 The only difference is I hold the flat base bullet on the case until it enters the die I found ifi don't do that, the heads fall off or get misaligned and crushes the case Link to comment Share on other sites More sharing options...
Boxer1 Posted July 16, 2013 Share Posted July 16, 2013 The RCBS Gold Medal Seater Die is awesome for these small bullets. I would pay 2 times as much for another now that I have used them. Link to comment Share on other sites More sharing options...
cautery Posted August 16, 2013 Share Posted August 16, 2013 The only difference is I hold the flat base bullet on the case until it enters the die I found ifi don't do that, the heads fall off or get misaligned and crushes the case +1 on this... I hold the bullet on the case and let the seater die "sweep" my fingers off the top of the bullet/case as I withdraw my hand... granted, this increases the risk of pinching your fingers, but IF you are paying attention to your reloading (and you are, right?), then it is not an issue. Link to comment Share on other sites More sharing options...
johnsons1480 Posted August 23, 2013 Share Posted August 23, 2013 I've had no issues with the 40 grain Nosler Varmageddon flat base bullets while using my Forster Ultra Micrometer seater die. They have some marketing material on their website to tell you how it holds the bullets straight. All I know is that my gauged runout has all but disappeared since switching to a Forster press and dies from the RCBS RockChucker with Redding dies. Link to comment Share on other sites More sharing options...
Mastiff Posted October 11, 2013 Share Posted October 11, 2013 Flat base is what I use. You got some good advice here. A staple in the tool box is the deburr/chamfer tool. A quick twist on I.d. will help the transition from the bullet to the case. Or if you're doing some volume, that RCBS case center looks like a real time saver. Dog Link to comment Share on other sites More sharing options...
Doc Hunter Posted October 11, 2013 Share Posted October 11, 2013 (edited) Flat base is what I use. You got some good advice here. A staple in the tool box is the deburr/chamfer tool. A quick twist on I.d. will help the transition from the bullet to the case. Or if you're doing some volume, that RCBS case center looks like a real time saver. Dog This. But there is a trick if you are running a progressive press. A Lyman "M" die can be set to just barely open the case mouth a touch. Bullet then has a nice straight path to follow. Don't over do it. With a progressive, size/case prep off the press, then run the "M" die in the first station. Edited October 11, 2013 by Doc Hunter Link to comment Share on other sites More sharing options...
Tim/GA Posted October 15, 2013 Share Posted October 15, 2013 Got one of the Lee expander dies since a lot of the bullets I get for 300 Blackout are flat based or cast. Love it. Link to comment Share on other sites More sharing options...
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