Ruger Precision Rifle vs. Remington 700 for Beginner .308?

[ar15barrels]

Just curious if anyone has borescoped their factory barrel for the Ruger RPR.

I just cleaned the barrel (previous owner said he cleaned it, but did a horrible job). After doing my cleaning (mainly carbon and fouling), I saw some scary things...

Don't look down factory barrels with a bore scope.
Just don't do it.

[bsumoba]

Don't look down factory barrels with a bore scope.
Just don't do it.

Yup....this was my face when I did:

[russ69]

Don't look down factory barrels with a bore scope. Just don't do it.

Good advice. Hammer forged barrels usually are fairly smooth...unless the mandrel gets nasty....

[bombadillo]

http://rifleshooter.com/2014/12/308-winchester-7-62x51mm-nato-barrel-length-versus-velocity-28-to-16-5/

Don't let the velocity scare you a whole heck of a lot. For your intents and purposes, I believe a 20" barrel is going to be an awesome setup for just about all you would want it for up till you decide you need a rebarrel.

[Discogodfather]

Just curious if anyone has borescoped their factory barrel for the Ruger RPR.

I just cleaned the barrel (previous owner said he cleaned it, but did a horrible job). After doing my cleaning (mainly carbon and fouling), I saw some scary things...

* Bad coppering on the lands. I saw this throughout the length of the barrel starting about 7-8 inches from the throat. Some areas were light streaks, but as I got towards the muzzle, it was just caked on. A regular cleaning is not going to clean this. I am going to have to do a full copper cleaning on this barrel tomorrow. Just too tired to do it tonight. Supposedly, the gun has around 30-40 rounds of factory ammo down it.

Noticed the same thing, bad coppering after about 100 rounds. Had to clean with copper solvent. Here is a bad video from my pathetic borescope. What are those bright lines after the lead? Sorry about bad quality.

[Pistool Jan]

Randall will weigh in on that but it almost looked like the crap near the end of the bore is a machining shaving. Also to my untrained eye the chamber reaming looked really rough. Perhaps?

No disrespect man but what borescope is that so I know not to buy that one? Is that the Lyman one?

Or could an LED in the bore have provided more light to get better quality? Perhaps if you allowed some light to get in at the breech and 'scoped it from the muzzle end outwards when observing the bore itself. Dunno.......I don't know the correct method of borescoping...... but the lack of light seemed problematic for the camera to focus and get a sharp image.

I've been thinking of getting one as I am attracted to older rifles..... especially bolt action .22's and I also just started off with my first vintage military rifle....a 104yr old Argy Mauser. It'd be nice to suss out the bores a bit more closely especially when buying.

I also had a name brand AR with a long barrel supposed to guarantee .5MOA @ 100Y and it didn't shoot that well. To the naked eye the bore looked very strange. Even the way the lands/grooves looked at the muzzle....like whatever cut it was dull and there were "chatter" marks visible on the surface of the lands. I wish I had had a scope to look into the bore. The company replaced it and the new barrel shoots better and looks better to the eye, so the problem was addressed.
But still, even though I am not a 'smith, I'd like to have a borescope in my firearm repair and tinkering toolkit.

[russ69]

Noticed the same thing, bad coppering after about 100 rounds. Had to clean with copper solvent. Here is a bad video from my pathetic borescope. What are those bright lines after the lead? Sorry about bad quality...

That looks like aluminum from using an aluminum cleaning rod without a bore guide. Am I right?

[Discogodfather]

That looks like aluminum from using an aluminum cleaning rod without a bore guide. Am I right?

All I use is a brass rod with a guide. No aluminum on it. Anyway, it's shooting very well, I'll trying and brush it another time.

On the borescope, I use a real cheap generic Chinese thing that is not gun grade, purchased it on amazon and it came directly from China. It works but its so bad.

Looking at the Lyman or the one innovative sells, the hawkeye is just too damn expensive.

[russ69]

That looks like aluminum from using an aluminum cleaning rod without a bore guide. Am I right?

All I use is a brass rod with a guide... .

Well, it's not the first time I was wrong....

[snowdog650]

If you goal is distance, the factory barrel on the RPR is 20", which is no good for a 308 unless you want to primarily shoot at short to intermediate ranges.

I am going out to 1120 yards @ 60*F in .308 with a 20" BBL on a Savage 10P before the 175-grain projectile goes subsonic. Obviously, further in warmer temperatures.

[ar15barrels]

I am going out to 1120 yards @ 60*F in .308 with a 20" BBL on a Savage 10P before the 175-grain projectile goes subsonic. Obviously, further in warmer temperatures.

The subsonic threshold is not the only concern dictating how far you make hits.

[diver160651]

I am going out to 1120 yards @ 60*F in .308 with a 20" BBL on a Savage 10P before the 175-grain projectile goes subsonic. Obviously, further in warmer temperatures.

high 800's before you risk transonic disturbances.. that said the bullets don't fall out of the sky..

As ARBarrels and JMP allude to is with slow velocities and stepper drop you reduce the danger space dramatically and deal with longer time in the wind.. both make hitting tougher at the end of the curve.