Probably the particular cartridge has more to do with this than the number of rounds. I know the .220 Swift had a reputation for being a barrel burner, way-y-y-y over bore capacity case + shooting bullets at extreme velocity = burned out rifling much sooner than a "standard" cartridge. Not letting the barrel cool during lengthy shot strings also contributes to this. I can't give you a specific magic number of rounds, likely the deterioration is gradual and your gun's accuracy will deteriorate gradually, not just go from 1" to 12" groups between round #4999 and #5000. How's that for a non-answer?
Amen,the only thing I would add is to limit the lead bullets,I had to have a remington 700 in 308 rebarreled due to lead buildup.Even the gunsmith could not get it out,The hotrods get less barrel life but I agree with everyone else that that 30/06 will shoot as well in 10 years as now if properly maintained,make sure you get the copper out as it can build up without looking all that bad.I use Butch's Bore Shine and if I get even a little bluest green color I scrub and clean till its spotless.To make sure I use(sparingly)sweets just to make sure no copper color is on my patch,(never leave sweets in your barrel)clean and oil the bore.Good luck.Drop-Shot
Mule knows what works,the stuff is great,don't leave it in a barrel and use in well ventilated areas(stinks to high heavens).I was once going to have a 30/06 rebarreled by a local gunsmith,he looked at the barrel and suggested sweets and sold me a bottle.I had never heard of it so I gave it a try,I had so much copper fouling in the throat of my rifle that it could not stabilize the projectile.Alot of scrubbing with a bronze brush and 1/4 bottle of sweets and I had no blue green streaks on my swabs.I oiled the bore and went shooting,the accuracy was restored and I didn't rebarrel that rifle,still shoots good,I gave it to a family member and occasionaly clean it with sweets to keep it copper free.Drop-Shot
It's not likely that you or I will ever SHOOT OUT a barrel. The only guys that I've ever heard that did this were bench rest shooters. To them,if they're barrel will no longer shoot one hole,then they consider it shot out.It's usually just the throat that has worn. Most will have the barrel cut off in front of the chamber and have it rechambered. If you ever get the chance to buy one of these barrels,BUY IT QUICK!(of cousre it needs to fit a receiver that you own). The accuracy for us regular shooter will be GREAT.
As stated plenty of times above,Most "shotout barrels" owned by a "regular" shooter is only in need of a very good cleaning.
Be careful when cleaning with some of these cleaners. You have to make sure that ALL traces of the previous cleaner is gone before statring with another. You can get some interesting reactions from mixing some of these things.
HWD I had to get one of those visor magnifiers to do work with small things(trying to learn how to make a folding knife)and NOW I read the fine print cause I can now see it,thats super advice.I got sick as a dog awhile back trying to clean a neighbors rifle.Never cleaned it in 6 or 7 years.Automatic transmission fluid has a high acidity level and won't harm a barrel so I used it and sweets and Mpro-7 and a suds like cleaner, a couple more I can't remember,not at 1 time but the residue could have mixed,I got sick for days.I do my cleaning in the garage now where I can open a window and turn on a fan.My reloading room is just for that now,reloading.Super advice.Drop-Shot
That's some interesting stuff that you was using. A guy that shoots BlackPowder Silo. matches, at our range, once explained his solution for cleaning his BP rifle. Would ya believe....ANtifreeze? He said that he plugged the end of his barrel and poured in the antifreeze. I knew that it's a caustic fluid due to working in the auto industry,but I'd never thought of this use. He reuses it by catching it in a bucket and refill his jug. After a couple of uses he discards it a local auto parts store that recycles and buys another jug.