Well I just got a SFRB in from Mr. Blackmon, had to wait a while but it was worth it.
Received a .257 core die set and a .257 6 S point form die set from him.
Now to get some time to play with it.
JW
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Well I just got a SFRB in from Mr. Blackmon, had to wait a while but it was worth it.
Received a .257 core die set and a .257 6 S point form die set from him.
Now to get some time to play with it.
JW
I know the feeling, mine are being shipped Monday, to complete my .30 cal. ensemble.
Bill
What press are you running them in?
I ordered a set in 17 cal and they are fine but I had to mod the punches a little to fit in a Corbin S press. Not a big drama but unexpected. The dies make great projectiles. Can not fault them as a die.
Bill
From memory it is a 6S PF die.
I have tinkered around a bit and have made 17 - 30 gn projectiles with it. They are as good as any hunting projectile on the market in regards to accuracy. The hard part was trimming the jackets to length but I have several methods now and all is easy.
Experimenting with poly tips now and the Blackmon die seem to handle the task well.
I am mainly shooting ferals under permit and the 17 Hornet with the light jacketed projectile is perfect for the task.
Bill
Happy day, they just arrived. Look out .308's here I come.
Where are you getting your jackets from, or are you making your own?
Bill
Anyone using Larry's round nose .308 dies? I seem to be getting a small nipple on the tip and are unable to adjust it out. Any suggestions?
Bill
Attachment 204714
left to right
185 gr lead tip 5.7 case trimmed to taper
185 gr 5.7 case
215 gr rnbt
190 gr rnbt
where are you getting your 17 cal jackets from or are you making them out of 22 rimfire cases?
The internal punch is too low.. Is there an adjustment on ejection wire? It needs to be moved up..if no adjustment a shim washer placed under internal punch should do the trick.. That little nipple is ok if you have a lead tipping punch to smooth it out. D
Yes the 17 jackets used in the Blackmon dies I make from 22lr cases. I draw them down through a D. Corbin die and then trim to length in a home built collet base in my drill press. Takes about 5 seconds per jacket. D. Corbin also built me a ET1 draw pinch die with several jacket length punches. I had to build a ejection system for it and it is not much quicker but a lot less manual handling in regards to hand movements to the jacket and back to the drill press. The jackets work very well in the Blackmon dies.
Getting jackets into Australia is cost prohibitive and more red tape than I care to invest in. They work fine at 4600f/s
Bill.S
WHOA!Quote:
They work fine at 4600f/s
I've taken mine up to 3900-4000 and they start blowing up. That is annealed and picked through for the ones with the smallest dimples. Fun for the sake of doing it, but a PITA when commercial jackets are available here so easily. Well, they were...
Can you short stroke your process here, I'm interested to know what you may be doing different to get that kind of velocity out of them without making them burst mid-flight.
Spin is the bullet killer. I've taken my .224s well past 4100 fps but that was in a 1-12" twist, that's only 246k rpm. Failure occurs at about 320k rpm with my .224s and 22LR jackets.
Yep, I'm talking .17 here too.
OK For the 17 cal, I do no different. I draw them down and the jackets are just under .012" thick. They are then trimmed to length with a end mill. All other operations are done in a set of Backmon dies. These were shot out of a 17/222. Could not tell you the twist rate. Testing is ongoing.
Bill
I stand corrected, the testing has only gone to 4400+
http://ausvarmint.com/forum/viewtopic.php?f=49&t=22481
Bill