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Changing powder & keeping bullet seating depth

 
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Old 02-15-2012, 12:40 AM
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Changing powder & keeping bullet seating depth

My question is, if I have my seating depth dialed in using 30 cal. Berger 210's and I change the brand of powder, should I expect that the seating depth would be the same and that I would just need to find the best node for the new powder? Just dinking around this winter trying out H1000 in place of RL22 in my 300 wm.
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Old 02-15-2012, 05:53 AM
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Re: Changing powder & keeping bullet seating depth

I have done it with good results more than once. If nothing else it would be a good starting point. Once you find the best powder charge you could always tweak seating depth to see if there is an improvement.
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Old 02-15-2012, 08:58 PM
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Re: Changing powder & keeping bullet seating depth

There won't be any improvement in moving seating from where you've found as optimum, regardless of other load changes.
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Old 02-16-2012, 05:47 AM
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Re: Changing powder & keeping bullet seating depth

However, if you are using a compressed load (in which bottom of bullet compresses the powder column), it will push the bullet back up slightly, destroying your OAL.
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Old 02-16-2012, 06:37 AM
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Re: Changing powder & keeping bullet seating depth

I have played around with this quite a lot and have found that generally the optimum seating depth does not change with powder changes. I agree with the previous comment that compressed loads with a low neck tension will allow the bullet to creep forward. This may not be noticeable while reloading. It could occur over time or upon recoil with the cartridges in your magazine.
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