Rifle Crown question

[jc89]

Is the crown of the rifle just the recessed part (the deeper set part of the muzzle) or the entire front end of the muzzle?

Reason I ask is I think I have a small scratch on the unrecessed flat area of the crown, but the deeper set area is fine. Will that affect accuracy, or is the cronw only the deeper set area?

EDIT:

This was a picture before I scratched it, but the scratch is on the outer flat rings (not the deeper set recessed crown). This won't affect accuracy even though there seems to be concentric circles cut into that area?

 

[meestermurphy]

Re: Rifle Crown question

Crown is basically where the hole comes out and transitions to the flat. So it is where the bore meets the outside of the barrel. Hope this makes sense, I am drunk.

EZ

 

[oneshot onekill]

Re: Rifle Crown question

I don't think it will affect your accuracy where you described it to be. As stated above the crown is only the transition between the bore and the flat. It affects accuracy because it determines how evenly the pressure escapes behind the projectile. If the crown is damaged the uneven pressure released can push the projectile off course just as it leaves the barrel.

 

[lonely_wolf]

Re: Rifle Crown question

I think your fine. I'm pretty sure the point of recessed crowns is that the outer part protrudes to protect the important inner part. So it can get dinged to hell and the rifle will still shoot accurately.

I could be wrong though, but it sounds logical.

 

[Luke]

Re: Rifle Crown question

Lonely Wolf is correct. The recessed portion is to protect the crown. It's only when you have a nick/scratch on the corner of the bore & and muzzle (i.e. the crown) that you should get it fixed.

 

[jc89]

Re: Rifle Crown question

alright thanks guys, very informative. i wonder why they cut concentric circles into the outer protruding flat area of the crown if it doesn't even matter? sounds like extra labor, might as well just leave it flat and untouched.

 

[LongArm]

Re: Rifle Crown question

I was told buy an older gun smith that he watched two men at a range shoot a group in a rifle then cut the barrel with a hacksaw, shoot another group, cut the barrel again, shoot another group and then cut it again and so on till they got it to the length then wanted to stop at. He said that the groups never opened up. The groups all were the same size (approx), however the uneven crown did make the groups point of impact shift each time they (unevenly) cut the barrel.

He also went on to state that the type of crown does not matter ie... flat, 11 degree, target. He said that as long as the crown is even and conentric that it would shoot accurately.

YMMV

 

[taseal]

Re: Rifle Crown question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JCL</div><div class="ubbcode-body">alright thanks guys, very informative. i wonder why they cut concentric circles into the outer protruding flat area of the crown if it doesn't even matter? sounds like extra labor, might as well just leave it flat and untouched. </div></div>

probably to make it look neat

I prefer your style (recessed), because when it gets dinged up, the crown itself is safe...

I think every crown should be done that way, there is no disadvantage (that I know of)

 

[Furtaker_.223]

Re: Rifle Crown question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lonely_Wolf</div><div class="ubbcode-body">I think your fine. I'm pretty sure the point of recessed crowns is that the outer part protrudes to protect the important inner part. So it can get dinged to hell and the rifle will still shoot accurately.

I could be wrong though, but it sounds logical.</div></div>

This is what I was always told.

 

[tt350z]

Re: Rifle Crown question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JCL</div><div class="ubbcode-body">alright thanks guys, very informative. i wonder why they cut concentric circles into the outer protruding flat area of the crown if it doesn't even matter? sounds like extra labor, might as well just leave it flat and untouched. </div></div>

Those rings are due to crappy machining, dull cutters, lack of attention to detail in a mass prodcued rifle, etc.

I'd be unhappy if my custom rifle came back from the smith with a crowning job that looked like that.