Back in May, I think it was, I started a thread on my problematic .270, M70 Carbine. I felt the 130g bullets could/should be my best performer in the 19" barrel. And I'd tried many of them: Nosler Part., Ballistic Silver Tip, Barnes TSX and in addition the Hdy. 140g. and 150g Ballistic Tip.

For some unkonwn reason the 150g Speer BT was the only one that would consistently shoot in the near inch category.

Then I took the advise of "Super 88" and put a small glob of silica gel between the barrel and forend - all groups went to mostly under 2" and the 150 Speers into sub-inch groups with 56.5g of H4831. In addition, I added a smear of white grease on the under-side of the barrel to keep the silica from bonding. It works.

Didn't have the time prior to hunting season (moving, down-sizing, remodeling, cutting trees...you get the idea) to try the 140 or 150g Barnes TSX, but I will now.

Question: Wondering if a 1/2" strip of the black rubber roofing material would work as well as the silica gel in taming the vibes of that short, skinny barrel?

Don't know about the roofing mat'l, but I met a guy who bedded the barrel chennel entirely in a carbine length Model7 Remmy that was shooting poorly. He had been having a heck of a time with it and the barrel channel bedding was his answer. I don't know if this would work but it sounds like some contact pressure in the forearm helped some. Has the action been bedded?

Yep, action has been bedded. I'm tempted to let it alone since the 150g Speer BTs shoot so well, but was thinking the rubber roofing might be a better (easier) solution to the problem. But, then I guess I don't really have a problem at this point, do I?

Am going to try the Barnes 150g TSX next.

Moving up and down in bullet weight may find you one that shoots but in a hunting rifle you'll want certain bullets.( I'm sure you have at least a couple fav's) I'd also recommend trying some flat base bullets. Although the boattail is in vogue it isn't really needed unless you take some really long shots. In fact, a round nose flat base works quite well for most hunting situations. The round nose will give a shorter bullet in the same weight and the profile is different. The ballistic loss isn't much under 300 yards and most people don't take game at that range anyway.

Wish I could give better advice, and would if I'd had this exact situation. My '06 shoots flat base bullets better than the boat tails. If the rubber roofing mat'l works let us all know, and take pictures of how you put it to use! Nate