I have a Hornady single stage press that uses the LNL bushings which have a rubber compression gasket. I am wondering with the extremely tight tolerances in seating depths ie .015 etc, from the ogive would the degree of compression on the rubber gasket (O-ring) affect the depth measurement ? If you finger tightened the bushing vs wrench tightening, would you get a different depth?
Hornady LNL quick change bushings affect seating ?
- Thread starter Brewster20
- Start date
Good question. I wish Hornady would have had two parallel flat sides on the bushings so I could get a wrench on 'em instead of having to use a wrench on the die. I was temped to run 'em through the bench grinder or chop saw.
I think the o-ring only provides some friction for alignment and 'feel' when installing/removing the bushing. The six lugs lock into position when fully rotated. I haven't noted any play when the die is loaded in use in compression, but then again, like all my die set-ups, the final results speak for themselves and the results can be measured to ensure it is working properly. I never use any dies in tension where play might become a factor and the results are less than satisfactory. In fact, I personally only recall one use that works in tension and that is my LNL Cam-Lock bullet puller.
The best way to find out is take the oring off and seat a bullet then measure to see if any clearance. I tried that on my LNL today and the only bushing in the press that had any movement I could measure with feeler gauges was the one I put my powder measure in.
I could just get a .002" gauge to get a little bit started. That's the smallest I have so you may want to use a dial indicator if you have one.
The o-ring purpose is only to keep tension on the bushing so it won't turn and loosen. My powder measure would do that once in awhile but Hornady will send shims no charge to take up any o-ring compression and keep it tight.
When I'm testing new loads I will just send one case around at a time and my col is never off more than .002". Now this is loading pistol so it may be much more than what you want to see in what you load.
I could just get a .002" gauge to get a little bit started. That's the smallest I have so you may want to use a dial indicator if you have one.
The o-ring purpose is only to keep tension on the bushing so it won't turn and loosen. My powder measure would do that once in awhile but Hornady will send shims no charge to take up any o-ring compression and keep it tight.
When I'm testing new loads I will just send one case around at a time and my col is never off more than .002". Now this is loading pistol so it may be much more than what you want to see in what you load.
Milanczar
CGN Ultra frequent flyer
Unfortunately not anymore.
Technical jargon and insistence that the caller is trying to get free shims because of something they read on the internet is the theme now.
Apparenty it is supposed to be impossible for this to happen and nobody is supposed to have a problem.
