Barrel break in true or not?

heres a broke barrel

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My CA rifle took 1545 rounds down the tube to finally break in so I wouldn't see pressure.
Lots of great insight and information in this thread.
 
Ive shot a group out of a new barrel (300 Ultra Mag Remington stainless) at 500 yards after a few down the tube to get my zero at 200...so lets say 5 shots before the 500 yard group....then shot 6 3 round groups dry patch and scrub at the end....reshot 3 shot group at 500 yard...and wow what a difference...Ok I lied pretty much the same group...maybe a little better but was it worth the 60 bucks for the box of shells I shot...I think not...I dont have a bore scope so couldnt tell you how it looked before and after...I love shooting long range but not a bench shooter...Most of my paper shooting is off the back of my tailgate on a lead sled between morning and evening hunts....so that makes me a dedicated long range shooter right?? lol
 
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I have a shillen and after the 20 round break in I could not get the groups below 1 1/4". AT 75 rounds, i took it back to the gunsmith and he gave it the evil eye and told me try it some more. At 125 rounds a couple of 1" groups popped up and at 175 rounds groups were averaging 3/4". At just over 200 rounds it was printing 1/2" 5 shot groups pretty regularly. This particular barrel just needed more shots!!
 
Until i got the BMW, i was solidly Mopar or NO car!!

Now i need a Roundell for my other arm. :D
Thats nice ink but dont think the beamer will pull the 16000 lb toyhauler loaded to the nuts to the mountains...I was a Ram man for years (love the cummins motor) until they borrowed a ton of money from the goverment....went to Ford that year and havent looked back...have a great day...
 
When a Barrel is Chambered, the "Throat Area", HAS Minor "Burrs" from, the Reamer and Un-Less, Polished / Lapped, that area can be, Problematic and, "can" accumulate,.. Carbon and Copper ( It's NOT,.. "Rocket Science" ).
Sometimes, "Shooting" solves, the "Burr Issue",.. sometimes,.. NOT !
Hey lefty
Look real close at this un named aftermarket barrel. Never installed sent back and replaced at no expense to me

1676491296610.jpeg
 
I have a shillen and after the 20 round break in I could not get the groups below 1 1/4". AT 75 rounds, i took it back to the gunsmith and he gave it the evil eye and told me try it some more. At 125 rounds a couple of 1" groups popped up and at 175 rounds groups were averaging 3/4". At just over 200 rounds it was printing 1/2" 5 shot groups pretty regularly. This particular barrel just needed more shots!!
I would call that a bad barrel.
 

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