Crown

Leave it sharp, or break the edge

 

Sharp and use a sharp cutter.

 

you guys are waaaaay above me I'm really just seeing if my membership has been upgraded.

 

and it has! Knew it was about this time last year. Gary

 

I leave it sharp, just wondering what other folks do with it

 

Sharp on a target rifle. Youll have a drawer full of tools before you find the right one. When you do itll resemble this one

 

I use a sharp high rake hss bit and add a small 45 degree chamfer on all crowns. As long as it’s clean and concentric is the most critical IMO.

 

Sharp and slow works for me, nothing more...

 

Micro 100 solid carbide mini boring bar for breaking the edge. Razor sharp and does a great job. Many of the top smiths use this bar with great results. Carry on.

Paul

 

It doesn't matter. I've done thousands with a chamfer. All indicated in +/- .00025"
The universal test. Run a Q-tip in and out. Does it pick up any fibers?

 

Yup, that's the tool.

 

So what's the purpose of dumping these here?

 

Positive rake inserts for AL leave a baby smooth crown for me. I’ve done flat & 11 degree, can’t tell any difference. I’ve broke the edge and left it sharp. I’m probably not a good enough shooter to know the difference. Just test it yourself and prove to yourself what is best.

 

I am with Dave Tooley on this one I always use a small chamfer and it helps to keep from scraping the coating on your cleaning rods. Sharp crown works ok but It gets damaged faster I think.

 

Only on special occasions, New Years and sorts. And only in moderation!

 

I break the edge on hunting rifles etc but leave em sharp on comp guns. I do believe that either way can work fine. I keep a razor sharp hss tool just for crowning. Spin it fast, move it slow and finish with very light cuts. Just my 2 cents worth.

 

what is the benefit of a razor sharp crown? The benefit of breaking the edge is to prevent cleaning rod damage. I'm not aware of any accuracy advantage of a razor sharp crown.

 

Just gotta be even with no burs

 

Sometimes not even then

 

1 less operation to induce error's. I use my crossfeed as the finish comes out nicer. At a 45^ Its on my hand movement to keep feed rate consistant. I cant match the gears!