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Discussion Starter · #1 ·
Does anyone do this - is it safe? i.e. The load calls for a 250 gr or 260 gr jacketed bullet. Can a 240 gr jacketed bullet be substituted? In some Lee loading info, they indicate or imply that it's o.k. but not to do the opposite - sub a heavier bullet when a lighter one is called for.
 

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You can go a little lighter on the bullet with no problems. However do not go heavier, especially when using max loads. If you use heavier bullets the pressure will increase possibly to an unsafe level.
 

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Discussion Starter · #3 ·
Thanks Rev... In looking at various manuals and comparing bullet weights vs. charges, I can see where using a slightly lighter bullet would be o.k. It's interesting to note the difference between bullets of the same weight but different brands. The loads I'm working on are on the lighter side (...for a 454) and not max. I'll be using a 240 gr vs. a 250 gr and keeping the charge between 5-8% of max.
 

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Just keep in mind, with out going into how much powder you are using. heavy bullets use less of the same powder, than a lighter bullet will use. Look at a load data info book. look at the powder that you are using. Watch what the data tells you as you go up in bullet weight. Lighter bullets use more powder. Common sense wants to tell you different, you think you need more powder to push the heavier bullet. But you dont, What is happening isthe heavier bullet is raising the PSI(pressure) cup level higher. Some powders the difference is not that great, But some are quite noticable. I always look at cup pressure figures when reloading. Especially the loads listed first, or rather the ones at the top of the list, under the bullet weight and type of bullet. :wink: Jack
 
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