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Rifles, Reloading, Optics, Equipment
Reloading
How does chopping a barrel alter velocity nodes?
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<blockquote data-quote="308ghost" data-source="post: 2093885" data-attributes="member: 117089"><p>I chopped 6" off my 6.5 creedmoor and lost 100fps. The load did not change. As I did another charge test at 600 yards. This was a heavier barreled match and is not noticeably any more or less accurate. I do however have the ability to put a suppresser on and have it be a manageable length. I didnt test any other combinations in this set up. I also just chopped the 24" tikka t3x super lite barrel to 21" (just in front of the flutes) for the same purpose. Again I lost velocity. I seamed to lose less velocity with heavier bullets though. (Fluke? I'm m not sure.) I lost about 60-70 fps with my 168 ablr load. And with the 190 ablr I lost 40-50. With the Berger 185 classic hunter I lost even less! I had to increase my powder charge .1 to maintain the former velocity with those Bergers. (Again I had the can on.) 185 bergers classic hunter 3000 FPS is a good combo. My 190 ablrs are moving 2905 and I'm in the middle of a seating depth test with these ones. All three of these bullets are shooting 3 shot sub moa at 600 yards. I have photos of the 168's ABLR and 185 bergers sub 3" inches. My 190's are super close to that but I'm still tweaking depth. I have detailed notes on this stuff if you interested in more. I know there are a few variables like the first 150 rounds on the barrel and once vs twice fired brass, barrels speed up and settle in about there. Twice fired brass may be a bit faster then new? Hope this helps.</p></blockquote><p></p>
[QUOTE="308ghost, post: 2093885, member: 117089"] I chopped 6” off my 6.5 creedmoor and lost 100fps. The load did not change. As I did another charge test at 600 yards. This was a heavier barreled match and is not noticeably any more or less accurate. I do however have the ability to put a suppresser on and have it be a manageable length. I didnt test any other combinations in this set up. I also just chopped the 24” tikka t3x super lite barrel to 21” (just in front of the flutes) for the same purpose. Again I lost velocity. I seamed to lose less velocity with heavier bullets though. (Fluke? I’m m not sure.) I lost about 60-70 fps with my 168 ablr load. And with the 190 ablr I lost 40-50. With the Berger 185 classic hunter I lost even less! I had to increase my powder charge .1 to maintain the former velocity with those Bergers. (Again I had the can on.) 185 bergers classic hunter 3000 FPS is a good combo. My 190 ablrs are moving 2905 and I’m in the middle of a seating depth test with these ones. All three of these bullets are shooting 3 shot sub moa at 600 yards. I have photos of the 168’s ABLR and 185 bergers sub 3” inches. My 190’s are super close to that but I’m still tweaking depth. I have detailed notes on this stuff if you interested in more. I know there are a few variables like the first 150 rounds on the barrel and once vs twice fired brass, barrels speed up and settle in about there. Twice fired brass may be a bit faster then new? Hope this helps. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How does chopping a barrel alter velocity nodes?
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