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Rifles, Reloading, Optics, Equipment
Reloading
Relaoding 6.8 SPC
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<blockquote data-quote="knc1105" data-source="post: 772459" data-attributes="member: 23577"><p>In my original 6.8 16" 1-10 twist the 115 MTK's shot fantastic. But I wanted to push it faster and flatter because the 115gr at 2,555fps fell off fast after 400 yards. The accuracy was still there but you were lobbing them in. The MTK bullet shoot very well but other bullets perform better on game. The SPCII allows a higher chamber pressure and a slower twist rate at 1-11 so it likes the 90-100 gr bullets smoking downrange. And that's what I wanted, a flat shooting hunting round out of a quick handling lightweight Jeep-friendly rifle. That load is with a Nosler Solid Base 100 gr bullet from the early 1980's but is almost identical the current Nosler Accubond except it has a lead tip instead of the new polymer. The original 6.8 is a 16" barrel which is what the round was developed for, my SPCII is a 20" barrel trying to get more velocity. Both loads used Remington brass with large rifle primers. That used to be all you could get and I bought a bunch, so both rifles will spend their life on Remington brass. Both have uniformed flash holes and benchrest primers. Both rifles shoot 1/8 MOA out of a sled at a 100 yard indoor range. I will PM you the info because I am reluctant to publish it because both rifles have been fire-lapped with Tubbs Final Finish and use Boran Nitride coated bullets. Fire-lapping and Boran Coating both reduce friction and drop chamber pressure so powder charges are increased. But the Boran Coating and Tubbs TMS (Throat Maintenence Service rounds) when used properly quadruple useful barrel life. Both loads are just over the published max so I worry about folks reading my post and using that in a un-lapped barrel with a naked bullet and exceeding published chamber pressures.</p></blockquote><p></p>
[QUOTE="knc1105, post: 772459, member: 23577"] In my original 6.8 16" 1-10 twist the 115 MTK's shot fantastic. But I wanted to push it faster and flatter because the 115gr at 2,555fps fell off fast after 400 yards. The accuracy was still there but you were lobbing them in. The MTK bullet shoot very well but other bullets perform better on game. The SPCII allows a higher chamber pressure and a slower twist rate at 1-11 so it likes the 90-100 gr bullets smoking downrange. And that's what I wanted, a flat shooting hunting round out of a quick handling lightweight Jeep-friendly rifle. That load is with a Nosler Solid Base 100 gr bullet from the early 1980's but is almost identical the current Nosler Accubond except it has a lead tip instead of the new polymer. The original 6.8 is a 16" barrel which is what the round was developed for, my SPCII is a 20" barrel trying to get more velocity. Both loads used Remington brass with large rifle primers. That used to be all you could get and I bought a bunch, so both rifles will spend their life on Remington brass. Both have uniformed flash holes and benchrest primers. Both rifles shoot 1/8 MOA out of a sled at a 100 yard indoor range. I will PM you the info because I am reluctant to publish it because both rifles have been fire-lapped with Tubbs Final Finish and use Boran Nitride coated bullets. Fire-lapping and Boran Coating both reduce friction and drop chamber pressure so powder charges are increased. But the Boran Coating and Tubbs TMS (Throat Maintenence Service rounds) when used properly quadruple useful barrel life. Both loads are just over the published max so I worry about folks reading my post and using that in a un-lapped barrel with a naked bullet and exceeding published chamber pressures. [/QUOTE]
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Reloading
Relaoding 6.8 SPC
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