Long Guns: Recessed Muzzle (?)

[oldfella]

Long Guns Question:

Besides helping to protect the muzzle crown from nicks, thereby ensuring the accuracy by allowing the uniform release of gas behind the exiting bullet, is there other advantages of a recessed crown - such as the sound emitted at the end of the barrel being pushed forward downrange? Thanks for your replies

Pete

 

[venomballistics]

dont know ... guess I need more guns to test this phenomena

 

[Pilgrim]

I think overall accuracy is increased as the rifling in the end of the barrel, damaged by cleaning rod wear and dirt and dings would be damaged after years of abuse.

Counterboring removes this and gives the bullet a clean straight path out the barrel.

 

[Cyrano]

If you happen to have a Ross rifle, be careful of the muzzle as Sir Charles thought a crown on the muzzle decreasd acuracy, so all their rifles, including the military ones, have no crown at all.

 

[diamond_c]

Quite a few of my milsurps are counterbored. It was done to improve/restore accuracy and does not effect the report or sound of the shot at all.

 

[WC145]

I have a Savage MKII BV that has had some work done on it by a local gunsmith. He offers a deeply recessed crown and I had him do one on my Savage. It supposedly directs the muzzle blast downrange making the gun quieter from the shooter's perspective. I know that when shooting subsonic ammo my rifle makes almost no noise. The loudest thing is the "hammer" falling when I pull the trigger.

I have the Levang Linear Compensator on my AR-15 and PLR-16, and the principle behind it is similar, direct the muzzle blast forward to make it more comfortable for the shooter. The Noveske KX3 works in a similar manner.

This is from an article on my gunsmith's website where he describes the deep crown he did on a custom .22, with a pic:

Crowning:
Much deliberation was taken in deciding what type of crown to use. In the end, I decided on a "Deep Dish" 11 degree target crown which protects the crown better than most, shoots fantastic, and deadens the nose to a certain extent by directing the noise forward. It also looks good and it is unlike the normal type of crown used on a benchrest rifle.

Here's a pic of the crown on my rifle, mine looks dull because I had him parkerize the rifle also:

This is the Levang Linear Compensator:

And the Noveske KX3:

 

[oldRoger]

For what it's worth, and in this case I think it's quite authoritative, Vic Volquartsen replied to query I made to him "The 32 hole comp is best to use for stabilizing the bullet and accuracy if noise is not an issue."
Volquartsen also makes a forward blow compensator which is actually more expensive.
So he is recommending a regular compensator with 32 radial holes together with the crown for accuracy.

 

[diamond_c]

Well, I just learned the difference between a counterbore and a recessed (deep dish) muzzle. Thanks for your post WC145, very nice!!

 

[Joni_Lynn]

I don't think it makes any difference in the guns. The only real benefit I can think of is that if you drop the gun and it happens to land muzzle down you may not ruin the rifling on the crown.