Home Forums Hunting & Shooting Ask The Gunwriters Dyna Bore Coat second application

Mule Deer (or anyone else who has coated a bore a second time)

I'm working with a stubborn .30 bore that showed some improvement with Dyna Bore Coat but still shows quite a bit of copper after a couple shoot and clean cycles. Copper remover is Montana Extreme.

How aggressive should cleaning be before applying a second coat? Do you need to follow the whole routine using bore paste and a copper remover, or does the abrasive remove the existing Bore Coat?

BeeMan

Pacnor...McGowen....Hart....take your pick.

BeeMan59,

Don't use the abrasive bore paste. Apply a solvent until the copper's gone, then degrease as with the original application.

Thank you John.

Great question - and answer! I was about to post this very same question. I bore coated a really rough 30-06 and it improved some, but I feel not enough.

Has anyone ever gone past 2 treatments? If so what factors drove you to that and how did it work out?

TIA,

Bob

I haven't, and have only done two in a couple of rifles. But the second one helped in both. In both cases I tried it because the people at DBC said some rifles benefit, and while I saw some improvement it wasn't as much as in other rifles with one application. Have also tried it in some pitted barrels, and it's helped there too.

In many bores, however, more shooting and cleaning after the initial break-in and cleaning results in less fouling. I've seen that several times.

MD,

You wrote that in some treated bores, it takes several fouling/cleaning cycles before any benefit is obtained. Any thoughts on why that is so? I appreciate that the ceramic beads and polymer matrix coat/fill in the fissures and pits so that fouling has less propensity to adhere and accumulate. What escapes me is why the bore becomes more resistant to fouling only after several fouling/cleaning cycles.

My guess (and it would only be that) is that the ceramic still reacts to the heat of shooting--especially, for instance, if the barrel gets pretty darn hot, as in prairie dog shooting.

Makes sense though.

I've just bore coated, for the 2nd time, a toasted 7mmRM bore. I can feel the patch riding rough for the first 10" of the bore. While chasing zeros, it will still make cloverleaf shaped holes in the target for the first dozen shots. So I ain't hearing a new barrel calling out yet. On the other hand, cleaning is a bish.

While curing the initial bore coating, I dawdle a bit between shots and the barrel did not get untouchably hot. Perhaps, that is why it still takes as long to clean the bore as it did prior to any bore treatment.

You're not supposed to dawdle between curing shots. Instead you're supposed to shoot 'em as fast as you can.

Will do. Thanks.

I had fits with a 338 Win mag years ago. Doug kept working with me.

Eventually we coated that tube either 3 or 4 times and its been just great ever since.

Thanks for the added discussion. This rifle has potential so if a couple more cleaning and rapid fire curing sessions can bring it around, great. It will repeatedly put the first half dozen rounds after cleaning in less than 1" at 100 yds.