7mm-08 Hammer Hunter Load Development

[DoneNOut]

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.

 

[PddPdd]

Varget would be my choice for 131 gr HH. What brand of brass?

 

[LVJ76]

I would try Varget and RL17, those two will give you the highest velocities for both bullets.

 

[DoneNOut]

Varget would be my choice for 131 gr HH. What brand of brass?

Privi Partisan. Has same volume as Remington brass.

 

[PddPdd]

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]

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:

7mm-08 LRP (Large Rifle Primer) | Alpha Munitions

– Optimized Case Design with Optimized Case Head Technology -100 count boxes ship in custom Alpha Munitions plastic cases with perforated bi-layer foam for protection of cases and loaded ammunition...

alphamunitions.com

 

[cape cove]

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.

 

[ButterBean]

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]

 

[ButterBean]

 

[ButterBean]

 

[dogz]

I would try Varget and RL17, those two will give you the highest velocities for both bullets.

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

 

[FEENIX]

Privi Partisan. Has same volume as Remington brass.

I am biased, but Prvi Partizan made me an average hunter; welcome to the club.

 

[ButterBean]

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