Muzzle crowning.

Best angle for muzzle crown?

  • 90 flat

    Votes: 1 5.6%

  • 11 deg

    Votes: 12 66.7%

  • 45 deg

    Votes: 0 0.0%

  • Other?

    Votes: 5 27.8%
  • Total voters
    18
A

AgentPickle

Member
Joined
Dec 28, 2022
Messages
29
Looking for advice on muzzle crowning. I want to improve the accuracy of this Anderson Rifle.
Anderson. Looking under the flash hider the crown is not bad but could be better. Right now I can get 1.5 inch groups at 25M with 77 grain 223. Probably will use the Brownells 79 degree cutter. Any experience with this? What would you use? Flat 90, 11 deg or 45 deg?
 
BTW, sleds can help with shooting, they can also make things worse.
I won't use one of the freakin things.
Have had excellent results using bipod and bag or front and rear bags.

BTW, my 1 in 8 rather liked 50gr Fiocchi varmint ammo, which is nice as its supposed to be my coyote rifle
(curse of the new E caller has yet to be broken).

I do have a FF forend and non stock trigger. Scope is 4X max.
 
Unless the muzzle is specifically damaged, going through the trouble of re-crowning the muzzle won’t help groups that are 11/2” at 25 meters.
The trouble of getting a new barrel and mounting that instead would almost certainly be worth it. Because either there is something very egregious in your shooting form, or that barrel is broken…

To that, and without offense intended, the method of testing is insufficient. That rifle may be capable of much better with a scope, not being clamped down, in a better rest, shooting at an easier to evaluate target,… without a bayonet? Just kidding, funny intro though.

In all, a reasonable plug for your channel. The younger sounding AI voice is funny seeing you shooting, but was overall enjoyable.
 
Demi-human said:
Unless the muzzle is specifically damaged, going through the trouble of re-crowning the muzzle won’t help groups that are 11/2” at 25 meters.
The trouble of getting a new barrel and mounting that instead would almost certainly be worth it. Because either there is something very egregious in your shooting form, or that barrel is broken…

To that, and without offense intended, the method of testing is insufficient. That rifle may be capable of much better with a scope, not being clamped down, in a better rest, shooting at an easier to evaluate target,… without a bayonet? Just kidding, funny intro though.

In all, a reasonable plug for your channel. The younger sounding AI voice is funny seeing you shooting, but was overall enjoyable.
Click to expand...
Sadly that is my real voice.
 
I cut my Mini-30 barrel down a bit from 18.5" to exactly 18". I Then rented a couple tools, including a facing tool and an 11º crowning tool from 4D Reamer Rentals. It turned out really well and it did improve performance. I could have used a 45º or something else, as long as it's done right. I'm happy with it.
 
Recutting a crown is a process which SHOULD be 100% predicated on provenance that the crown is damaged or otherwise defective in some way. I know it used to be a relatively common recommendation from gunsmiths, much like asking a barber if you need a haircut, or being asked if you want the extended warranty at checkout, or being asked if you want to add the 100 point inspection and replace your air filter when you go in for new tires, but a consumer REALLY has to remind themselves cutting a crown REALLY should only be done when we know the problem is with the crown.

The video depicts a bargain bin AR barrel shooting 4-10MOA at 25yrds... No crown work will help this rifle become a sub-moa shooter, and I'd bet HEAVILY against any ammunition helping that much either, that dog just don't hunt...
 
Last edited:
Varminterror said:
Recutting a crown is a process which SHOULD be 100% predicated on provenance that the crown is damaged or otherwise defective in some way. I know it used to be a relatively common recommendation from gunsmiths, much like asking a barber if you need a haircut, or being asked if you want the extended warranty at checkout, or being asked if you want to add the 100 point inspection and replace your air filter when you go in for new tires, but a consumer REALLY has to remind themselves cutting a crown REALLY should only be done when we know the problem is with the crown.

The video depicts a bargain bin AR barrel shooting 3-5MOA at 25yrds... No crown work will help this rifle become a sub-moa shooter, and I'd bet HEAVILY against any ammunition helping that much either, that dog just don't hunt...
Click to expand...
I never expected it to be, I just want to improve the accuracy slightly.
 
A good crown will help nearly any rifle. And that's because inexpensive bargain rifles don't have a good crown from the factory. There are a lot of measures one can take to make a mediocre rifle into a good shooter... life by a thousand cuts, if you will. But the question was about crowning.
 
I have no advice on crown angle, but I am wondering. Do you wish to recrown the barrel just to see if it will work to improve accuracy as an experiment?
 
I'm with others on this. Knowing how bad the accuracy is there is something mechanically wrong here. A new crown on this barrel is like putting a band-aid on a sucking chest wound. Didn't it slow down the bleeding... well a little bit. But there are other issues to address.

Maybe looking at it from a different perspective... since new has this rifle ever been consistently accurate with ANY load? If the answer is no, the above answers apply. If the answer is yes... then I would double check the actual twist of that barrel using a tight brush on a cleaning rod method to know what it is and can it handle the 77 gr projectile length?

Steve
 
From what I see, the 11º crown is a favorite with target shooters but I prefer a recessed crown on my Hunting and Varmint rifles.

I have a friend thats earned the nickname "Hacksaw" because he likes short barrels and has cut most of his rifles off. He uses a round headed brass screw and lapping compound to recrown his barrels with. Don't get me wrong, the term "Hacksaw" leads you to think of "Bubba" but my friends work looks professional. I think he has since purchased some tools from PT&G to do his crown work.
 
AgentPickle said:
Looking for advice on muzzle crowning. I want to improve the accuracy of this Anderson Rifle.
Anderson. Looking under the flash hider the crown is not bad but could be better. Right now I can get 1.5 inch groups at 25M with 77 grain 223. Probably will use the Brownells 79 degree cutter. Any experience with this? What would you use? Flat 90, 11 deg or 45 deg?
Click to expand...
That's pretty lousy accuracy with 223. I could shoot Ballentine groups with an issued M16 when I was in the National Guard when we zeroed at 25 meters before qualifying.
 
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