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Rifles, Reloading, Optics, Equipment
Reloading
Does seating depth and crimping affect velocity?
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<blockquote data-quote="royinidaho" data-source="post: 145117" data-attributes="member: 2011"><p>Welcome aboard. Have a great stay!!!</p><p></p><p>[ QUOTE ]</p><p>--------------------------------------------------------------------------------</p><p></p><p>I have a few questions for you guys to answer,</p><p>1) Does seating the bullet .005 off the lands change velocity as opposed to seating .020 off the lands? <font color="blue">Yes, I believe you will find that the deeper the seat the lower the velocity. (here come the arguments) </font></p><p>2)Does a light crimp make velocity slower as oppossed to no crimp? <font color="blue">I really don't know. Never crimped a rifle load. </font></p><p>3)I shot some reloads with my 7mm rem the other day, it was -15c or a 5f (cold) my loads were </p><p>RL22 66.5gr with 140 accubonds out of a 26" barrel,Sauer 202, my average speed with these loads was 2975fps.The Nosler book list that laod at 3240fps with a 24' tube, WHY THE BIG DIFFERENCE does the cold affect the velocity that much or is my barrel a bit slow? It is a new gun this was the 2nd time at the range with it.<font color="blue">First I'd break it in properly then go to shooting. To respond to your question: That's a 265 FPS difference. If it were my 270 Win. with same weight bullet and powder type, 130 FPS would be due to the temperature change from summer to winter. That leaves 135 FPS for differences in chambers/barrels/bores/rifling and other variables. From my shooting of a 7mm Rem, you're running about par with factory ammo. </font></p><p> </p><p></p><p>[/ QUOTE ]</p></blockquote><p></p>
[QUOTE="royinidaho, post: 145117, member: 2011"] Welcome aboard. Have a great stay!!! [ QUOTE ] -------------------------------------------------------------------------------- I have a few questions for you guys to answer, 1) Does seating the bullet .005 off the lands change velocity as opposed to seating .020 off the lands? <font color="blue">Yes, I believe you will find that the deeper the seat the lower the velocity. (here come the arguments) </font> 2)Does a light crimp make velocity slower as oppossed to no crimp? <font color="blue">I really don't know. Never crimped a rifle load. </font> 3)I shot some reloads with my 7mm rem the other day, it was -15c or a 5f (cold) my loads were RL22 66.5gr with 140 accubonds out of a 26" barrel,Sauer 202, my average speed with these loads was 2975fps.The Nosler book list that laod at 3240fps with a 24' tube, WHY THE BIG DIFFERENCE does the cold affect the velocity that much or is my barrel a bit slow? It is a new gun this was the 2nd time at the range with it.<font color="blue">First I'd break it in properly then go to shooting. To respond to your question: That's a 265 FPS difference. If it were my 270 Win. with same weight bullet and powder type, 130 FPS would be due to the temperature change from summer to winter. That leaves 135 FPS for differences in chambers/barrels/bores/rifling and other variables. From my shooting of a 7mm Rem, you're running about par with factory ammo. </font> [/ QUOTE ] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Does seating depth and crimping affect velocity?
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