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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Fire Lapping a Barrel
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<blockquote data-quote="7mmRHB" data-source="post: 798717" data-attributes="member: 3584"><p>br45zy, I've done over 100 break-ins on factory bbls with the Tubbs Final Finish bullets. It works amazingly well every time, if done properly. First of all, buy the TMS kit which consists of the same grit as the #3s and #4s out of the Final finish kit. You don't need the coarse #1s and #2s unless you have the worst factory bbl on the planet. I have only used the # 2s on two bbls ever!! The TMS kit contains 50 bullets so you can get two break-ins from each kit. Use a light charge of RL22, For a 300 RUM ,about 79 grns if the bullets are 175s and 78gr if they are 190s or 76 grs of H4831.Seat the bullets with plenty of jump to the rifling ( .050 or more ). Always shoot the first shot over a light layer of Kroil in the bbl. Shoot 5 then clean spotlessly ,lightly swab with Kroil and shoot five more and so on until done. It will be cleaning in a couple of patches by the last cleaning. Never fire a tubbs bullet down the bore if the bbl is more than just warm to the touch. Just blasting away without cooling the bbl is why most people think that the tubbs kit doesn't work, or takes out your throat!! I have done more than 50 RUMs and they always show great improvement in SDs, ES and accuracy and it takes 2 more grs of powder to get back to the previous max pressure but with increased velocity. Don't let anyone tell you the don't work or that they harm your bbl because if you do it right you will be happy!! ---- RHB</p></blockquote><p></p>
[QUOTE="7mmRHB, post: 798717, member: 3584"] br45zy, I've done over 100 break-ins on factory bbls with the Tubbs Final Finish bullets. It works amazingly well every time, if done properly. First of all, buy the TMS kit which consists of the same grit as the #3s and #4s out of the Final finish kit. You don't need the coarse #1s and #2s unless you have the worst factory bbl on the planet. I have only used the # 2s on two bbls ever!! The TMS kit contains 50 bullets so you can get two break-ins from each kit. Use a light charge of RL22, For a 300 RUM ,about 79 grns if the bullets are 175s and 78gr if they are 190s or 76 grs of H4831.Seat the bullets with plenty of jump to the rifling ( .050 or more ). Always shoot the first shot over a light layer of Kroil in the bbl. Shoot 5 then clean spotlessly ,lightly swab with Kroil and shoot five more and so on until done. It will be cleaning in a couple of patches by the last cleaning. Never fire a tubbs bullet down the bore if the bbl is more than just warm to the touch. Just blasting away without cooling the bbl is why most people think that the tubbs kit doesn't work, or takes out your throat!! I have done more than 50 RUMs and they always show great improvement in SDs, ES and accuracy and it takes 2 more grs of powder to get back to the previous max pressure but with increased velocity. Don't let anyone tell you the don't work or that they harm your bbl because if you do it right you will be happy!! ---- RHB [/QUOTE]
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Fire Lapping a Barrel
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