Bought a Rem .375 H&H stainless take-off barrel and put it on my left-hand Rem 700 (electroless nickeled receiver & fiberglass stock). Also added Williams fiber lighted sights and a Pentax 1.5-6x scope I had laying around.

Went to the range last week. The thing patterned everything it was fed. It also had severe copper fouling.

Today, had some 265 gr cast gaschecked bullets that I'd coated with varying grits of polishing compound.
First group, same as last week.
Second group, started to tighten up.
Third group, hmmmm!
Fourth group, five shots in 1.21!

Fired some other groups with jacketed bullets. It now has become my favorite.

My shooting partner fired it with the lead loads and really liked it. Then he fired one factory load...Win 300gr Silvertip. It was immediately handed back.

I think you discovered the reason eBay is full of $25 new Remington takeoff barrels. Patterning has been my experience with all of them in recent years.

Thanks for the replies.
Have never used wipeout, but will get some. The copper fouling has stopped now that the barrel has been fire lapped. Still have a copper fouling problem with Swift Sciroccos, though.

Yeah, I like those $25 take off barrels (though usually for a new one it runs closer to $50). I've replaced several barrels this way, and you are right, either fire lapping or hand lapping is necessary to get them to shoot their best.

Ooops! Was using the Sciroccos in two other guns. Copper fouled excessively.