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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
velocity spreed
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<blockquote data-quote="RockZ" data-source="post: 473933" data-attributes="member: 5750"><p>You are right.</p><p>It is amazing what differences there are in loads and different rifles!</p><p></p><p>I'm sure you can reduce your spread by working up.</p><p>It looks like you are well off the max load for the 160AB and 60gr of H4831SC.</p><p>At 60gr you are getting a low fill rate as well </p><p>I checked some numbers :</p><p>With your oal Quickload gave me a max of 67gr.</p><p>Hodgdon gave 64 gr for 162gr HDY SPBT</p><p>Sierra gave 63.6gr with their 160gr bullets.</p><p>I read online that Nosler max was 65.0, but don't have their manual so can't confirm.</p><p></p><p>Of course these numbers are just a guide, but they do suggest you have plenty of room.</p><p></p><p>I would suggest to work up in .5 grain increments over the chrono.</p><p>You should find a load as you work up that will offer a lower es/sd.</p><p>It may even be in the 63.5 range, but work up slow as you have been doing and you should find it.</p><p></p><p>Don't let the 100yd accuracy get you stuck on a load.</p><p>Unless you are getting very little vertical at long range.</p><p></p><p>If you are shooting 2" groups at 600yds , the load is fine!</p><p></p><p>Then it could be a chrono issue as mentioned before.</p><p></p><p>I have a load that puts 3 bullets in the same hole at 100yds. But has an ES of 40 and shoots a huge vertical at 600yds.</p><p></p><p>My load with the least ES, 9 fps, is 3.5 grains higher and is nearly at my max.</p><p>And only has 1.5" vertical or less at 565yds.</p><p></p><p>I think you will have great results as you work up.</p></blockquote><p></p>
[QUOTE="RockZ, post: 473933, member: 5750"] You are right. It is amazing what differences there are in loads and different rifles! I'm sure you can reduce your spread by working up. It looks like you are well off the max load for the 160AB and 60gr of H4831SC. At 60gr you are getting a low fill rate as well I checked some numbers : With your oal Quickload gave me a max of 67gr. Hodgdon gave 64 gr for 162gr HDY SPBT Sierra gave 63.6gr with their 160gr bullets. I read online that Nosler max was 65.0, but don't have their manual so can't confirm. Of course these numbers are just a guide, but they do suggest you have plenty of room. I would suggest to work up in .5 grain increments over the chrono. You should find a load as you work up that will offer a lower es/sd. It may even be in the 63.5 range, but work up slow as you have been doing and you should find it. Don't let the 100yd accuracy get you stuck on a load. Unless you are getting very little vertical at long range. If you are shooting 2" groups at 600yds , the load is fine! Then it could be a chrono issue as mentioned before. I have a load that puts 3 bullets in the same hole at 100yds. But has an ES of 40 and shoots a huge vertical at 600yds. My load with the least ES, 9 fps, is 3.5 grains higher and is nearly at my max. And only has 1.5" vertical or less at 565yds. I think you will have great results as you work up. [/QUOTE]
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