View Full Version : Crowning Questions?

September 3, 2002, 12:05 PM
What are the advantages of an 11 degree crown over a 45 degree or vice versa?

Also, should crowning a barrel change the POI?

I recrowned my SKS and it shot a few inches to the right first time out. It's no problem as it does group tighter, I'm just curious as to why I needed to adjust the sight.

September 3, 2002, 01:59 PM
Absolutely square to the bore probably the most important factor.

Your point of impact shift may be due to correction of an old crown problem.....or a new one.


September 3, 2002, 07:06 PM
... it could have changed the barrel harmonics which, IMHO, would more likely cause a shift in POI. Then again, if you didn't rest or bench it in the same manner, that too could have caused the shift.

kurt IA.
September 4, 2002, 07:57 AM
Both the above are right, I cut a barrel 1/4 inch at a time and re crowned, from 27" down to 22" and had a 1.5 to 2 inch inpact change each time, in this case it was a 22RF barrel and I was trying to tune it for best group.

September 4, 2002, 08:39 AM
Thanks guys. I guess what I experienced is within the range of normal. It's amazing what you can learn by trying new stuff.

Anybody have any opinions on the different crown angles?

kurt IA.
September 6, 2002, 08:21 AM
I have not found that one stile has any advantage over the other, cut the one you like, or is easy for you. I like a resested flat crown.