What is the issue and what are you trying to do with the bullets? Barrel only has 200 rounds? Caliber and semi auto?

You can try it. Won't hurt from the sounds of it. I actually used the TMS rounds in my 20" PSA.

If you use the Final Finish do like you were planning and only using the 3 finest grits. Clean the barrel very well getting all the copper out before using them and between each grit.

Yup might as well try it. Won't hurt anything in that rifle. Follow the directions on how to load the bullets and powder to use. Hopefully it helps.

Did you try taking the A2 flash suppressor and shoot it? Sometimes they can effect accuracy.

I'd try cleaning the barrel with JB Bore Polish, Kroil and VFG pellets first. BE SURE TO BUY the Adapter for the pellets ( All available at Brownells and with the current free shipping coupon, it is stuff you will use again )

You can adjust the "fit" of the pellets to the bore, by simply threading them on further / tighter... Or looser, if desired...



SS barrels take a little longer to break in.

Do you have a bore cam you could use / borrow ? I'd check the leade and throat first... that is a critical area for your barrel.

http://bulletin.accurateshooter.com/2019/10/50-teslong-borescope-works-great-full-review-with-videos/

From Kriegers webpage .... https://kriegerbarrels.com/faq#breakin

"Because the lay of the finish is in the direction of the bullet travel, very little is done to the bore during break-in, but the throat is another story. When your barrel is chambered, by necessity there are reamer marks left in the throat that are across the lands, i.e. across the direction of the bullet travel. In a new barrel they are very distinct; much like the teeth on a very fine file.

When the bullet is forced into the throat, copper dust is removed from the jacket material and released into the gas which at this temperature and pressure is actually a plasma. The copper dust is vaporized in this plasma and is carried down the barrel. As the gas expands and cools, the copper comes out of suspension and is deposited in the bore. This makes it appear as if the source of the fouling is the bore when it is actually for the most part the new throat.

If this copper is allowed to stay in the bore, and subsequent bullets and deposits are fired over it, copper which adheres well to itself, will build up quickly and may be difficult to remove later. So when we break in a barrel, our goal is to get the throat “polished without allowing copper to build up in the bore. This is the reasoning for the fire-one-shot-and-clean procedure.

From BA's webpage...

"No matter how polished the finish is inside the chamber of a barrel, tooling marks in the throat will always be across the direction of projectile travel. When a bullet is fired, copper dust that is dissolved in the expanding hot gasses, travels through the bore and then condenses on the bore and the rifling. To the untrained eye, fouling appears to be caused by the bore due to the projectile travel but in fact it is the cross sectional feed lines in the throat that cause fouling. Now, with this understanding we see that barrel break in is really a smoothing effect about the throat."

I have gently polished throats before... but that is another subject.

I'd try the Kroil , JB Bore polish and VFG pellets first. As mentioned, you will use all of that stuff again... great cleaning system, IMHO. And it will hone the bore pretty danged smooth.

The fire lapping might help, but as always no guarantees. I have always considered fire-lapping a last ditch effort.

@snakeyes711
Oops ... added a ink to a "decent" bore camera. Not Apple IPhone friendly

The Tubb bullets will smooth that throat area out and why I said to clean the bore very well before using them as you want the lapping grit to hit the steel and not copper. It will actually do more than the usual shot one and clean "break in".

As I said I have used the FF and TMS rounds with good results. The TMS are good for custom barrels as it's a very fine grit. Finer than the lapping compounds. Here is a piece I wrote on them. First part was written in 2001 on the old Sniper Country but I added the TMS later.

http://teamblaster.net/reviews/TubbFFTMS.pdf

Think I asked before but forgot but where in NC are you?

Ah ok. I am just south of Fuquay Varina.

Thank you very much !! I have a "problem" barrel that might be a good candidate for this.

Very Nice !!

Looks like it worked well for you and your barrel !

Might give it a try on a stinker barrel I have been trying to "fix" for a friend.