Clean & Cold vs. Hot & Foul

[rogue]

Rifle: Remington 700, 22" Sport barrel - floated OK

(will eventually be replaced with a 24-26" varmint barrel)

At 200 yards, my shots move down the target several inches from my first round thru a cold/clean barrel (like 9 inches above aimpoint) to my fifth or sixth round which hits within about an inch or two of the aimpoint. (shooting the six rounds in about 4-5 minutes)

Following thru 10 or so more rounds without cleaning keeps me right in the neighborhood of the bull (aimpoint) pretty consistently (when I don't blow the shot). When I clean the barrel, I go a little high again.

It just occurred to me that I need to check that my barrel is still floating when hot (I haven't) as a dollar bill slides all the way down the barrel OK when cold. It's floated OK off the factory stock, cold at least (I had to sand to get that).

One of the applications for this gun will be hunting so I guess I want to stay zeroed for a cold barrel. Is there anything I can do to close up the delta between where bullets are hitting between a clean/cold barrel and a hot/foul barrel? Nine inches elevation at 200 yards seems like way too much. I was considering a moly treatment for the barrel and bullets.

New to this forum and I love what I see!

Ron Robinson

rsr@cartsupport.com

[tightloop]

Take off the barrel and put a good one on the rifle...Hart, Kreiger, Wiseman, Pac Nor That will cure all the problems..

sounds like it is torquing with the heat of the rounds..

[Ray S.]

Good starting place:

http://www.hartbarrels.com/

[texasag93]

A sporter barrel will heat up quickly. THe first shot or two from a clean barrel usually will not hit point of aim with the subsequent shots. Couple of fowling shots for starters will solve that. If the barrels is to hot to hold on to don't shoot it. Let it cool down between shots. Bedding the action and making sure it is completely floated will help. If all this doesn't help a new barrel and trueing the action will help. Good luck. TXAG