Could my RPR 6.5CR barrel have eroded 0.050"?!

Discussion in 'Reloading Forum (All Calibers)' started by done111, Mar 25, 2019.

  1. done111

    done111 Silver $$ Contributor

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    I currently shoot a 6.5 RPR, gen 2. I have been shooting this regularly for approximately 2 years, maybe a tad more. I don't know exactly how many pills have gone down the barrel but probably around 2500 rounds. I checked using my hornady tool to see what the distance to the lands were expecting maybe 0.010"-0.015" deeper than factory new and maybe I would then adjust my bullet out the same....holding a typical 0.020" jump to the lands. To my surprise, the thing is 0.050" deeper than when I first bought it!!!

    Question is.....is that typical? I don't run it hot, my velocity with a 140 ELDM using H4350 is right at 2700 fps or a smidgen less. I have been thinking of getting another barrel in the future and maybe I need to be getting that going a lot sooner than I thought.
     
  2. TAJ45

    TAJ45 Gold $$ Contributor

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    What do your most recent groups tell you?
     
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  3. done111

    done111 Silver $$ Contributor

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    I am going to run an abridged OCW test. In fact, that's why i made the length-to-lands measurement to see if I should change my seating depth for the OCW test. I noticed my SD/ES were off and I was 4 firings into my Lapua brass. I salt bath annealed the brass. I also just started a new jug of H4350, so I am running another OCW test around the load that has been working. I think my groups are not as good as before, but I'm going to see if I can tune it before pronouncing a verdict.
     
  4. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    At 2500rds youre way past top notch life. If youre just plinking who cares about the throat moving forward. If youre competing with it, barrels are a component. Youre at the point of primers falling out and you putting them back in with your thumbs- get a new barrel
     
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  5. murray brook

    murray brook Silver $$ Contributor

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    My 25/06 went .065 in appx 750 rounds.
     
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  6. TAJ45

    TAJ45 Gold $$ Contributor

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    My Bud had .0008" !!! after 800 rds in a long necked 6XC running 107s in mid 3200s, XCal bbl he chambered himself.
     
  7. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    Temperature change can cause .0008- even room temp change
     
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  8. TAJ45

    TAJ45 Gold $$ Contributor

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    Sure Dusty, but the point was lack of erosion after 800 rds.
     
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  9. Dgd6mm

    Dgd6mm Silver $$ Contributor

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    Pills???? Was it sick, did it have to be sedated?? Seriously, I think with that powder in that cartridge you should be glad that that's all it has lengthened.
     
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  10. Stickler

    Stickler Silver $$ Contributor

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    .0008? TAJ45....what method was used to get that level of accuracy in the measurement?
     
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  11. Fotheringill

    Fotheringill

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    Yes. I speak from experience.
     
  12. Nick Caprinolo

    Nick Caprinolo Gold $$ Contributor

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    My Ruger PRP became inconsistent at the range. I bought a bore scope and found that the throat was eroded on the left side extending about a 1/2 inch into the lands. I called Ruger and asked about a replacement barrel because I had such good use or the original. They would not sell me a barrel but offered to replace it for me. I sent it back to them and two weeks later it was back in my hands. It shoots like new and I am very pleased. Coast was $400.00 which included shipping both ways. By the way, the old barrel had 2,000 rounds down the tube.
     
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  13. Joe Salt

    Joe Salt Silver $$ Contributor

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    Some guys I shoot with chase there lands, you may give that a try or put the bullet in the lands and start all over to see what happens.

    Joe Salt
     
  14. TAJ45

    TAJ45 Gold $$ Contributor

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    Msmnt done meticulously w Hor gage, multiple times iirc.
    PS my Smith chambers to .0002 max tir.
     
  15. Zero333

    Zero333 Silver $$ Contributor

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    I use the same bullet to check the OAL to the lands throughout the life of the barrel to get a accurate #.
    At least a bullet from the same lot as the original.
     
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  16. shoot4fun

    shoot4fun Gold $$ Contributor

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    I've seen throats move .025" in the first 200 rounds. First thing I do with a new barrel is polish out the throat with Iosso on a patch. That gets rid of any burrs, however imperceptible, that may left over from the reamer. Then I measure.
    I don't think, at 2,500 rounds of 6.5 Creedmoor, your barrel has anything other than normal wear.
     
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  17. Don

    Don Gold $$ Contributor

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    Every 6.5 I have had , has had a shorter life than my .308’s .
    All my rifles are Match Rifles shot Prone .
    I had 260 Impv. .047 at 1900 rounds .
    I am a believer that small Hole big burn = short life for the throat ?
     
  18. rckendall

    rckendall Gold $$ Contributor

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    My Gen 2 barrel was worn out at 900 rounds, as was first noticed on the target, then confirmed with a bore scope. I chased the lands once at around 600 rounds if I remember correctly.

    My buddy’s Gen 1 is doing well at around 2500 rounds. It seems that the Gen 1 barrels lasted far longer.

    Richard
     
  19. Fliers

    Fliers Gold $$ Contributor

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    I think the 6.5 will erode much faster if you shoot higher pressure/faster rounds. 2800+

    I'm curious, I've seen some aftermarket barrels for sale for the RPR for $450-600. Wouldn't these be a lot better than a factor replacement at $400?

    http://www.shilen.com/RPRBarrels.html ($400-500)
    https://patriotvalleyarms.com/ruger-precision-rifle-rpr-prefit-match-barrel/ $500
    https://criterionbarrels.com/products/prefits/ruger-precision-rifle-pre-fit-barrels-stock-models/ ($500-600)

    Edit: for completeness... I also saw good reviews for this barrel.
    https://www.longriflesinc.com/colle...nt-barrel-for-ruger-rpr?variant=3311750676493 ($575)
     
    Last edited: Mar 26, 2019
  20. Nick Caprinolo

    Nick Caprinolo Gold $$ Contributor

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    Maybe, I don't really know. I looked at some of them and decided since my factory had shot so well when I got it it was worth a try. I am very please at how it turned out.
     
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