What type of crown does your rifles have?

Question:
What style crown for the barrel?

Choices:
Target crown
Field crown

 

my rifles are a mix of Target and field.

quote:

Originally posted by ar corey:
What type of crown does your rifles have?

I think we found Him?
Somebody who know?

I have some of both, about 50/50.

Most of my hunting rifles have the factory barrels that come with field crowns. The match and varmint guns have match barrels installed and they have target crowns.

I have a mix but the real question is what difference does it make> A good crown is a good crown.

quote:

Originally posted by wasbeeman:
I have a mix but the real question is what difference does it make> A good crown is a good crown.

You are correct. Target crown??? My BR barrels have always had a flat crown as do 95% of the BR rifles on the firing line.

Just to throw a little more dirt on this silly question, many years ago, a friend bought a milsup rifle (can't remember the cal nor country) with a looong barrel. He cut it off with a hacksaw, dressed it with a mill file, and CROWNED it with a carriage bolt chucked in a drill. He killed a lot of deer with it.

quote:

Originally posted by wasbeeman:
I have a mix but the real question is what difference does it make> A good crown is a good crown.

That's why I am asking. Don't know anything about crowns.

Seems a good uniform field crown would suffice.

To my understanding, the crown is merely a set-back to keep the rifling from getting dinged up. Nothing more, nothing less. Over the years, I have read very learned comments about the correct degree of the crown, but then they used to debate how many angels could dance on the head of a pin.

quote:

Originally posted by wasbeeman:
To my understanding, the crown is merely a set-back to keep the rifling from getting dinged up. Nothing more, nothing less. Over the years, I have read very learned comments about the correct degree of the crown, but then they used to debate how many angels could dance on the head of a pin.

jc

Just put one on it, or cut it 90 degrees. I'm not all that sure it matters for hunting situations. I did some experiments a long time ago with a 30-06 barrel that I damaged, put in a bucket to rust, etc. and it didn't make a statistical difference in the end. The point of impact moved, but the accuracy was not impacted enough for hunting situations. As I said a long time ago, I got tired of being called a liar, so I quit saying it. Here is what Saeed did.

Saeed's Experiment

Test Number 2

Absolutely, Larry...It always tickled me how we will believe an "urban Myth" but NOT actual tested facts...and NO ONE (or very few) seems to want to do their own testing to verify.

My "crowns" are all over the place including all that are "normal, popular or factory"...and a few of my own iterations that seem to work no matter. I used to carry a round head brass screw with valve grinding compound and an electric drill because I slipped and stuffed my recessed nose into a pile of granite rocks which ended that hunt abruptly...and REALLY chewed up the whole rifle.

"Hunting" accuracy can run the gamet between 1" and a paper plate at 50 yds and "hunting accuracy?" is in the eye of the user...SO IS which creown is the "best"...and the argument goes on and on just like the energizer rabbit.

Good Hunting...whatever hour "crowning" glory.

Damaging the crown or hunting with an improperly cut crown would probably change first shot ballistics and introduce another variable in the barrel harmonics.

I will be using my brothers 7600 this fall for moose as I won't be able to afford a 7mm Weatherby. The bullet will be a 140 gr. Hornady Interlocks out of a 270 Winchester. The crowns on both my Dad's and brothers 7600's are pristine.

quote:

Originally posted by ar corey:
Damaging the crown or hunting with an improperly cut crown would probably change first shot ballistics and introduce another variable in the barrel harmonics.

I will be using my brothers 7600 this fall for moose as I won't be able to afford a 7mm Weatherby. The bullet will be a 140 gr. Hornady Interlocks out of a 270 Winchester. The crowns on both my Dad's and brothers 7600's are pristine.

[URL= ][img]

AR, I like to make nice work of the crowns I machine, probably well over a thousand to date. Angled,radius,square,counter bored,whatever the clients require. I true them up to the the rifling and polish the finish. But imho,the crown's main function is to protect from damage, the final bit of the rifle the bullet's touch on their way to the target.jc

quote:

Originally posted by wasbeeman:
Just to throw a little more dirt on this silly question, many years ago, a friend bought a milsup rifle (can't remember the cal nor country) with a looong barrel. He cut it off with a hacksaw, dressed it with a mill file, and CROWNED it with a carriage bolt chucked in a drill. He killed a lot of deer with it.

Yep. That was my Dads method.

Seeing that Browning symbol reminds me of a 30-06 X-bolt, never shot an Xbolt yet.

Not to hijack this thread but a rebarrel Xbolt in 7mm Weatherby would be nice. I like the sixty degree bolt and would use it up to and including hot loaded 7mm STW.