7mm-08 Hammer Hunter Load Development

BFD Guns

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Got the powders posted in the picture.

Thinking 120gr and 131gr Hammer hunters. I plan to crimp into one of the grooves on the bullet. WLR primers.

Tell me about the neck tension required for these? I always thought a great degree of tension caused runout.
 

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PddPdd

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I was able to just reach pressure signs with Winchester brass slightly compressed but not Petersen. I'm not sure about your two options.
 

QuietTexan

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Tell me about the neck tension required for these? I always thought a great degree of tension caused runout.
Try them tight, like FL without an expander tight. Use a mandrel if you have them to get to 0.004-0.005", but that's tighter than what my Hornady FL dies could get thinner-necked factory R&P and Hornady brass down to. I mic'ed neck thickness and checked against loaded round diameter.

Runout shouldn't matter, if you have to use a mandrel to get up to 0.004" the mandrel should largely straighten in out. Chamfer with a 28* VLD tool, and if it's less than 0.003"runout after seating then just shoot them. Unless you're shooting past 600 yards I would say you won't see the runout on paper.

Alpha makes 7mm-08 brass if you want something higher end. In stock now even:
 

cape cove

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Regardless how small you size you necks you will end up with appx .002-.003 interference fit. What happens is the bullet acts as an expander and opens up the case neck , only this can induce bad run-out and can damage to the bullet. If you are looking for high start pressure ( bullet release) I would suggest a Lee factory crimp die . @ButterBean is your man for info and set-up on this die.
 
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ButterBean

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Got the powders posted in the picture.

Thinking 120gr and 131gr Hammer hunters. I plan to crimp into one of the grooves on the bullet. WLR primers.

Tell me about the neck tension required for these? I always thought a great degree of tension caused runout.
It does not just pull your expander ball and you will be fine
 

ButterBean

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Bingo...........R17 shoots balls out in my little 788/carbine 7/08. It shoots great with the 110's to the 175's!
Got the powders posted in the picture.

Thinking 120gr and 131gr Hammer hunters. I plan to crimp into one of the grooves on the bullet. WLR primers.

Tell me about the neck tension required for these? I always thought a great degree of tension caused runout.
Varget will be the best out of that lot but it will be too slow 8208XBR or CFE223 will be your Huckleberry's
 
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