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Hunting
The Basics, Starting Out
7mm REM MAG
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<blockquote data-quote="BountyHunter" data-source="post: 60593" data-attributes="member: 12"><p>Bobdds</p><p></p><p>1. Muzzle brakes by themselves do not affect accuracy. having said that they can indirectly lead to better groups as you are not fighting recoil and they can change the barrel harmonics either good or bad for that particular load.</p><p></p><p>2. Once a barrel is crowned and chambered it can never be successfully lapped by hand by anyone. Anyone who says that they can to is full of BS. All the barrel makers lap before sending the blank out and they can show an enlargement of the bore at the muzzle and chamber ends. They put a cut across the muzzle about 3/4" down to make sure that the end is cut off. Lapping after chambered is a big NO NO.</p><p></p><p>You can "fire lap" with either the Neco or Tubbs kits. Advise you to take it easy and only use about 50% of the number of bullets they state and then check to see if you need to do more. Too much and throat is gone.</p><p></p><p>My advice is shoot it and see how it shoots. You can lap the lugs on the bolt, check trueness of bolt face and check the crown on the muzzle. Until you rebarrel you are pretty much stuck with the barrel other than recrowning and firelapping without destroying the barrel.</p><p></p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 60593, member: 12"] Bobdds 1. Muzzle brakes by themselves do not affect accuracy. having said that they can indirectly lead to better groups as you are not fighting recoil and they can change the barrel harmonics either good or bad for that particular load. 2. Once a barrel is crowned and chambered it can never be successfully lapped by hand by anyone. Anyone who says that they can to is full of BS. All the barrel makers lap before sending the blank out and they can show an enlargement of the bore at the muzzle and chamber ends. They put a cut across the muzzle about 3/4" down to make sure that the end is cut off. Lapping after chambered is a big NO NO. You can "fire lap" with either the Neco or Tubbs kits. Advise you to take it easy and only use about 50% of the number of bullets they state and then check to see if you need to do more. Too much and throat is gone. My advice is shoot it and see how it shoots. You can lap the lugs on the bolt, check trueness of bolt face and check the crown on the muzzle. Until you rebarrel you are pretty much stuck with the barrel other than recrowning and firelapping without destroying the barrel. BH [/QUOTE]
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The Basics, Starting Out
7mm REM MAG
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