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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Velocity swings
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<blockquote data-quote="Michael Eichele" data-source="post: 482523" data-attributes="member: 1007"><p>That is very similar to how I 'work up' loads. I typically will start at 100 with the use of a chrony to make sure there are no red flags in regards to excessive velocities. After I have a 'range' of charges that are acceptable I will move to 300 and test my groups in .5 grain increments. I still shoot over the chronies and document the results but I learned along time ago that you cannot get excited about 20-30 FPS extreme spreads. Some of the best grouping loads have been in this range even out to 600+/-. At 1K though, good harmonics or not, there is pretty notable vertical spreads when dealing with 30 FPS spreads. It seems though that the higher BC bullets are a bit less affected but still notable. All that said, I still am of the opinion that good harmonics are worth more than low ES's but having both is much better.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 482523, member: 1007"] That is very similar to how I 'work up' loads. I typically will start at 100 with the use of a chrony to make sure there are no red flags in regards to excessive velocities. After I have a 'range' of charges that are acceptable I will move to 300 and test my groups in .5 grain increments. I still shoot over the chronies and document the results but I learned along time ago that you cannot get excited about 20-30 FPS extreme spreads. Some of the best grouping loads have been in this range even out to 600+/-. At 1K though, good harmonics or not, there is pretty notable vertical spreads when dealing with 30 FPS spreads. It seems though that the higher BC bullets are a bit less affected but still notable. All that said, I still am of the opinion that good harmonics are worth more than low ES's but having both is much better. [/QUOTE]
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