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Post by gunmutt on Jan 31, 2016 2:42:39 GMT -8
When starting a new load in development how far should I back it off the lands? I am loading 264 LBC with lapua brass and hornady 120gr a-max
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Post by Deleted on Jan 31, 2016 5:10:35 GMT -8
When starting a new load in development how far should I back it off the lands? I am loading 264 LBC with lapua brass and hornady 120gr a-max You shouldn't be able to reach the lands at mag length. I would measure your magazine and deduct .005 as a place to start. |
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Post by gunmutt on Jan 31, 2016 5:18:00 GMT -8
I am wanting to single feed these
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Post by Deleted on Jan 31, 2016 6:09:03 GMT -8
I am wanting to single feed these I start touching the lands. This way I have eliminated having to move in, as I only have one way I can move the bullet. Just watch for pressure signs when working up your powder charge. Only change one thing at a time so you can see the effect it will have. It doesn't do any good to change powder and seating depth at the same time because you wouldn't have any idea which one changed your load. |
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Post by gunmutt on Jan 31, 2016 6:50:22 GMT -8
Okay well I pulled .015 off the lands. I am going to run a ladder test in .4 increments of powder charge. Then I will test 5 shots groups of the closest ones. Then with that I will push towards the lands in .05 till I just touch them. After that I might bump up the charge slightly if needed and check. Then I will run out of powder or bullets and have to start over because they are on back order. Lol
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Post by Deleted on Jan 31, 2016 7:37:11 GMT -8
Sounds like you didn't need any help or advice after all. By the way .4 grains is to much for the Grendel case. You could go right by the accuracy node and never see it. Try .2 grain increases or decreases.
You could also shoot 3 shot groups until find a good starting point. That would give you more data while saving powder and bullets.
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