Barrel twist rate??

[Ironbarr]

If it isn't known, how would I go about determining the twist rate?

-AndyB

 

[xring44]

I use a cleaning rod with a tight patch. it must have bearings in the handle to allow the rod to turn, following the rifling. Start your cleaning rod into the lands from the breach end, as soon as it is fully engaged in the rifling, mark the rod with tape even with the back of the action, now place a dot on the rod in front of the handle faceing straight up. Start your rod moving through the barrel and observe the dot rotating, when it is again located straight up, mark the location at the back of the action. measure the distance between the two marks and you have the twist rate. one turn in "X" inchs.

 

[rbernie]

I usually just place a mark on a cleaning rod, put a tight patch over a jag, run the rod into the bore until my witness mark is pointed up, and then measure how much rod I have to insert into the more to get the mark to index stright up again as I run it thru. It's crude, but it works so long as you can eyeball fairly accurately and make sure that your patch is tight in the bore.

Edited to add - Xring beat me to it, and his write up is better. What he said.

 

[P95Carry]

Haha - it's been said

Only saying Hi Andy - just spot you now and again!

I will say - rifles are way easier to measure twist on with a rotating rod but - even a snub can yield if care taken. They usually come out around 18 TPI IIRC.

Best

 

[Ironbarr]

Truly appreciate the rapid response on this (if only FEMA could approach your speed, guys). Thank you.

I have an AR that was rebarreled to solve a front sight cant problem - it went away an HBAR - came back stainless steel. I occurred to me that I had no idea of the twist rate - it'd be best if I knew.

xring44/rbernie - that'll work for me - again, thanks.

Chris... time slides by when we're having fun, huh?
(I'll catch up with you some later. Be careful out there.

-AndyB