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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Feedback wanted: 1:7 twist and/or progressive twist for 300 PRC
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<blockquote data-quote="Capt RB" data-source="post: 2152158" data-attributes="member: 85987"><p>THere were quite a few 9,9.25 to 8.7 gain twist 7mm barrels for f-class made. I shot a few all were either Barts or Rock creek not sure they were not my rifles. They all seem to produce a bit more velocity than the straight 9 or they all shot accurately a bit faster meaning the node was 30-50fps faster than the 9twists shooting the 7/300wsm or the 284 improved don't know which flavor of improved. My 308 is a rock creek and it has 5/8" or so of gain twist from 12.5 to less than 12. It has been measured so many times I still don't know if it is 11.875 or 11.775. That barrel has 5600+ rounds on it and it is still under 1/2 moa. It has always been cared for with not alot of hot strings. It has been fast since day 1 running box ammo 100-150fps faster than the box stated speed.</p><p> FOr the 300PRC stick with an 8 for 230 serrias , 245 Bergers and 250 atips. FOr the 230 a tips 230 Bergers 225eldm and down cup and core 8.5 or 9. My 10 does fine with the 225 eldm and 230 Bergers around 3020fps. I am not done with load development due to a shortage of brass. I also have a 30" barrel vs a 24 or 26" so my speeds are a bit higher than normal. If you are going to run a solid like the GS or icbm from badlands. The198 flatline bullet would pick up some transonic stability with a 7 however an 8 is the recommended twist. With a G7 over .400 and the ability to push it around 3300fps it would be a neat way to spend some money on bullets</p></blockquote><p></p>
[QUOTE="Capt RB, post: 2152158, member: 85987"] THere were quite a few 9,9.25 to 8.7 gain twist 7mm barrels for f-class made. I shot a few all were either Barts or Rock creek not sure they were not my rifles. They all seem to produce a bit more velocity than the straight 9 or they all shot accurately a bit faster meaning the node was 30-50fps faster than the 9twists shooting the 7/300wsm or the 284 improved don't know which flavor of improved. My 308 is a rock creek and it has 5/8" or so of gain twist from 12.5 to less than 12. It has been measured so many times I still don't know if it is 11.875 or 11.775. That barrel has 5600+ rounds on it and it is still under 1/2 moa. It has always been cared for with not alot of hot strings. It has been fast since day 1 running box ammo 100-150fps faster than the box stated speed. FOr the 300PRC stick with an 8 for 230 serrias , 245 Bergers and 250 atips. FOr the 230 a tips 230 Bergers 225eldm and down cup and core 8.5 or 9. My 10 does fine with the 225 eldm and 230 Bergers around 3020fps. I am not done with load development due to a shortage of brass. I also have a 30" barrel vs a 24 or 26" so my speeds are a bit higher than normal. If you are going to run a solid like the GS or icbm from badlands. The198 flatline bullet would pick up some transonic stability with a 7 however an 8 is the recommended twist. With a G7 over .400 and the ability to push it around 3300fps it would be a neat way to spend some money on bullets [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Feedback wanted: 1:7 twist and/or progressive twist for 300 PRC
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