What crown do you use?

[ShtrRdy]

On a short range benchrest barrel, what type of crown do you use. Several of the local guys like just straight across . Is this a common crown cut?

 

[Will Henry]

I have always recessed the crown by about 1/16" and broke the corner with a 60 degree cutter. I think I'll stick with that. WH

 

[DaveTooley]

Recessed 90 degree flat crown.

 

[linebaugh]

recessed flat is all I cut now. On a true bench gun I may go 90 flat with no recess.

Last hunt in Texas I was looking at a rifle I built for a friend and there was a nasty ding on the rim before the recess. He had no idea it was there... A little protection never hurts.

 

[LVLAaron]

Recessed flat.
If it's for someone else, I will put the tiniest chamfer on the on the crown to help prevent dings. If it's mine, I leave it sharp.

 

[Bob3700]

On a competition rifle that utilizes a clamped on front sight base, the crown is recessed beyond the sight base. Then 11degree with a 60 degree touch.

 

[jackieschmidt]

Through the years, many of us who shoot Short Range Benchrest have used about every conceivable crown known. A plain old burr free 90 degree flat or 90 degree recessed is as good as it gets.

 

[Judd]

I use a 90 recess if it’s not something that will have a suppressor screwed to it…if it’s a suppressor host, it gets an 11 degree crown. The only reason, it’s way easier to clean the carbon off of.

I’ve not noticed any difference in the way the shoot.

 

[Bob3700]

Years ago in Precision Shooting there was an article on crowns. They started little by little damaging the crown and it didn’t affect the accuracy of the rifle one bit. It was a varmint style 308 if that matters any.

 

[epc308]

Years back I read an article in Precision Shooting regarding crowns. In a nutshell, the writer had done extensive testing cutting them to 11, 45, and 60 degrees, flat, recessed flat, combinations of those listed, and probably some I forgot. The conclusion was that all shot equally well as long as they were concentric and perpendicular to the bore.

 

[gunsandgunsmithing]

I've seen crowns make a huge difference, like pie plate at 100 to tack driver with no obvious damage.. and I've seen terrible crowns shoot just fine. Not sure the rhyme nor the reason either way. I typical use a flat sharp crown on my target rifles. Barely break the edge with about 500 grit in a lathe, carefully at that

 

[spitfire_er]

Flat on target rifles and recessed flat on a hunting rifles. A guy I helped out about 15 years ago loved 11 degree on everything, but I never liked them for no specific reason. Never saw a difference in accuracy.

 

[Fuj]

Something to think about from a tool makers point of view. What
angle on the very edge of the crown could, should, would, give you
the best life expectancy of that edge ?? What crown angle do you
think would wear faster between the use of a flat based bullet verses
a boat tail ??

Note that if your going to touch that edge up with much steeper cut,
why not do the whole crown that way ??.......Been meaning to do a full
60 degree crown on one of my mule barrels that is still threaded for
for one of Mike Ezell's PDT's. Dang thing might shoot ?? And changing
the exit gas pattern, may help keep inside the tuner cleaner. Man, cleaning
that PDT using Varget is getting old......LOL

I use an 11 degree cut I just touch with crocus paper on a wooden dowel.

 

[V35]

A simple 11 degree, and I sometimes will hit the lands with a 45 degree cut on my hunting rifles. I have done flat, recessed flat, rounded, I cant see any performance differences in them.

 

[LVLAaron]

Personally, because I'm lazy. I can cut a flat crown with the auto-feed cross slide and not need to move my compound. The little kiss I give the edge of the crown, just enough to break the edge, is... 30 degrees.