.25 cal 131g .330G7 bullet from Blackjack Bullets for you to drool on ...
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lee31
Well-Known Member
I tried H4831sc,RL23,RL26 and Retumbo. I settled on RL26 at 54 grains and a Fed 215M bullet jumped .020. Gives me 1/2 moa or better 5 shot groups from 100-1000 yards if I do my part. I'm planning on taking it out to a mile once we get done decent weather here in Wisconsin. Velocity of is averaging 3167fps. This is a near max load in my rifle.
86alaskan
Well-Known Member
Getting ready for my 25 creedmoor in a Tikka T3 package for comps. I realize that the H4350 is the go-to for the creedmoor case, but what about RL16 or RL26? Seems like I get more speed from the same charge of RL16 out of my 260, so it should wok for the 25 creed? I like the looks of that 3070 speed range, I'd be holding on plate out to 1k even in a hurricane!!
I'd go with H4350 in a comp gun, due to the slight temp instability and carbon rings that rl26 is subject to. A two day match can add up to 200+ rounds fired, if want the most consistent/cleanest powder possible, that's just me.
257 Blackjack
Well-Known Member
I believe the first ~16,000 we sent out are in the 1.415-1.420" range and the rest of them have sharper noses consistently coming in at 1.438-1.440".
Your lot sounds like the 0.330-0.333 G7 lot. When you burn those up come back for some of the pointier ones for some 0.345-0.350 G7 action!
The only 1.420"s we have left are staying here with me to shoot out of my personal rifles.
cjhunts_alot
Well-Known Member
Has Bryan Litz gotten his hands on any of these yet? We need a real BC number 
257 Blackjack
Well-Known Member
Has Bryan Litz gotten his hands on any of these yet? We need a real BC number
Yes we sent 40 of them to AB for testing 4-5 months ago, but haven't seen results yet. These were from the shorter 1.420" batch.
We used an Oehler 88 system at 1000 yards over multiple 10 shot strings and changing conditions to provide an average G7 BC @ 1000 yards. Litz / AB used to test the bullets out quite far over dual chronograph setups much like the Oehler 88, but with all the new tech these days I do not know what distances they are using their radars at on new bullets - medium range (200-600 yards), medium 800-1000 yards, and long range will yield different averages of course. I used to have all of his books but have not kept up with their most current methodology.
I really wanted them to do their testing and results and still do, but with the trusted long range competitors I know running the bullet and reporting nothing but over our 0.330 G7 test data of the early production run, I am more than happy with the results. At 0.330 G7 any 6.5 parent cartridge necked down to 25 cal cannot keep up in Wind, energy, or trajectory no matter the 6.5 bullet selection. At 0.345+ G7 that performance gap is only larger.
Guys running 0.330 G7 are shooting over small and medium sized targets at 800 yards out to long ranges. These guys are in the top levels of PRS/NRL competition and know what they are doing.
Different twist rates and rifling combinations (as well as MV having a slight effect) will yield different BC results - that is to say AB's eventual number will be somewhere in the range of actual BC's resultant of guys using our bullet.
I prefer test data over field data any day, but it seems our Oehler 88 test data was a bit conservative.
When's the last time a bullet mfg has had to raise their BC 15 G7 points? Certain MFGs routinely exaggerate their bullets BC and that causes doubt for the few that do not.
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I ordered 1k last night, are they gonna be the longer ones ?
257 Blackjack
Well-Known Member
Yes sir. it may have been another thread that I mentioned it in, but I will be the only one shooting 1.420"s until they are gone. They are still good at 0.330 G7 but I want to send out the longer sharper ones to our customers.
86alaskan
Well-Known Member
Well then, that's good news. I've measured a couple lately for Strelok and I'm coming up with 1.435 average on my lot. So I guess I'll be changing my starting BC to .345. These should be real wind cheaters.
cjhunts_alot
Well-Known Member
My comment was in good jest. I really appreciate the work you guys have done to revitalize the .257. I'm still trying to wrap my mind around how awesome a bullet with a .345 g7 will be when it's pushed to 3300 with minimal recoil. I can't imagine a better medicine for long range deer hunting.
257 Blackjack
Well-Known Member
Let us know what you see and what twist and barrel length you are running! The more information the better.
86alaskan
Well-Known Member
You got it. I'm stoked to get this puppy up and running.
