Yeah and the more bearing surface you have, the more it would affect it and the more you have to push it, the more loosey-goosey it gets. Definitely a consideration with longer VLD bullets we seat closer to the lands.
Bullet Runout
- Thread starter Kmccord
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xsn10s
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My groups at 550 yards with off the shelf dies and a Remarms 700 ADL. Any fitting to seater stems or polish of dies I do myself. And the work is minimal. Heck I seat my bullets with a cheap handheld Lee press. Only because I don't have the room or time to setup my reloading room.
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Idaho Lefty
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WITH,. "Off, the Shelf Dies",. you,. GOT,.. LUCKY ! ( And, Good for, You as, MOST People, AREN'T that, Lucky ! )
I got real TIRED of, "Playing with" Other Brands of, Dies.
Forster TOOK all, the Headaches and Guess work, Out,.. for Me ! ( .001 to .002 Max,.. Run Out )
I still "Lap" my seater STEM, to any VLD Bullet, I use
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The Hornady works great for high runout factory ammo. Tooooo... much straightening will affect neck tension in handloads, but the Hornady is still great for "nudging" a bullet the other way. Doesn't seem to affect neck tension as much on factory ammo with tight neck tension and crimps at all.
The Hornady gauge also measures concentricity a little differently than other gauges like the Sinclair. The Hornady measures runout from bullet tip to case head. The Sinclair (like many others) measures runout from case neck to bullet tip. Bullet runout will measure differently with the same case on each gauge. Still all relative though.
xsn10s
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I do this all the time. With multiple cartridges.
WeiserBucks
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That's a 550 yard group?
Kmccord
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I have a Forster die for a 6.5 Creed, it works good, but it will pass some runout at times, not as much as what I am seeing at this time, probably going to try and anneal the brass, trim and see if anything different.
I'm always trying to correct runout - I'm loading for my nephew's 270 Win at the moment and did a bit of testing yesterday with my Dad's old RCBS dies.
Virgin Winchester brass in RCBS seater - runout to .014"
Once fired Winchester brass, neck sized only, in the same seater - .006" runout or better.
I'm finding the relationship to the case and the die to factor in significantly, the less clearance between the case and die the better. I run the die down on an empty case and set the die a bit off of contact. Seems to be helping.
A sloppy fit between the seating stem and the bullet also compounds the issue. I'm going to purchase a better seating die and set of stems soon. YMMV
Virgin Winchester brass in RCBS seater - runout to .014"
Once fired Winchester brass, neck sized only, in the same seater - .006" runout or better.
I'm finding the relationship to the case and the die to factor in significantly, the less clearance between the case and die the better. I run the die down on an empty case and set the die a bit off of contact. Seems to be helping.
A sloppy fit between the seating stem and the bullet also compounds the issue. I'm going to purchase a better seating die and set of stems soon. YMMV
Holy Moly !
That's a 550 yard .268" group??
FYI… I only check runout for match loads. I'll always select the best runout rounds if going yo an F/TR match.
Besides that, I just accept the extra bit of runout for all other purposes.
I have other dies that I don't mandrel size and they shoot fine for hunting and range shooting.
xsn10s
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No it's my 100 yard group. Sorry for the mix up. I was responding to too many threads at the same time.
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xsn10s
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No the .268" group on paper is 100 yards. The steel plate picture with the white spray can next to it for scale is the 550 yard group. Sorry for the mix up. I responded to a couple of threads this morning with some sleep deprivation.
I think your 550 yard steel group is missing in the post.
