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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.280 or 6.5x284 for elk
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<blockquote data-quote="Oklahunter1" data-source="post: 1938181" data-attributes="member: 105120"><p>To give a update: I re checked my .280 velocities this morning and verified it was correct. I also shot Nosler Factory ammo with 160 gr partitions also. The ammo box said the velocity was 2775 FPS. It chrono'd at 2643 FPS. I believe the reason for the difference is their velocity was determined with a 26" barrel as their load data was shot using a 26" barrel. My barrel is 22". My .280 velocities again chrono'd at 2635. Right now I'm leaning towards using the 6.5x284. I've got time to decide.</p><p> One thing I've noticed when shooting over a chrono is the first cold bore shot is always around 50-60 FPS slower than all the rest of my shots. I've seen this in two of my rifles. Anyone have a explanation??</p></blockquote><p></p>
[QUOTE="Oklahunter1, post: 1938181, member: 105120"] To give a update: I re checked my .280 velocities this morning and verified it was correct. I also shot Nosler Factory ammo with 160 gr partitions also. The ammo box said the velocity was 2775 FPS. It chrono’d at 2643 FPS. I believe the reason for the difference is their velocity was determined with a 26” barrel as their load data was shot using a 26” barrel. My barrel is 22”. My .280 velocities again chrono’d at 2635. Right now I’m leaning towards using the 6.5x284. I’ve got time to decide. One thing I’ve noticed when shooting over a chrono is the first cold bore shot is always around 50-60 FPS slower than all the rest of my shots. I’ve seen this in two of my rifles. Anyone have a explanation?? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.280 or 6.5x284 for elk
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