Just wondering who's running these in their trebly and what powder they're using. I've got 2207, 2219 and BM2 on hand. Hoping to cut down on the faffing about and go with something proven. Thinking 2219 to start with.
Any advice welcomed.
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Just wondering who's running these in their trebly and what powder they're using. I've got 2207, 2219 and BM2 on hand. Hoping to cut down on the faffing about and go with something proven. Thinking 2219 to start with.
Any advice welcomed.
What rifle?
I’m running 50 gr vmaxs in a sako.222 but also played with some 52 gr HP Speers
Pretty sure I’m using BM2 powder but I’ll check when I get back home
Tikka M595
I'm using 2207 with 52gn Speer HPs and 50gn Winchester PSP. Shot well enough haven't tried other powders. Bergara single shot 20" barrel.
Win 748 for me.
I’m using BM2 with 60gr Hornady in my .222. Very accurate.
Win 748 and 52 Sierra's work for me.
Win 748 & 52gn Targex
Go the BM2, it runs really well in the 222 with a near full case.
well so far on ones has mentioned eld-m's, so looks like we are not really of much help! Have you worked out seating depth/COAL yet? Or restricted by magazine length? If you tell me your COAL I can punch some numbers in GRT and see what that says for the 3 powders you have to hand.Quote:
Originally Posted by charliehorse
Haha correct but that's no bother on this occasion. Definately not restricted by magazine length. Was just going to start with OAL from the Hornady manual which is 2.180. Or do you need CBTO?Quote:
Originally Posted by bjp
that'll do, what barrel length?Quote:
Originally Posted by charliehorse
570mm, case capacity is 25.3g H2O
That's a relatively low case volume. GRT is showing following max. loads:Quote:
Originally Posted by charliehorse
2207 18.7gn 3080fps, 95% burn, 95% case capacity
2219 21.5gn 3110fps, 92% burn, 102% case capacity
BM2 21.6gn 3050fps, 83% burn, 98% case capacity
pointing towards the 2219 I would say from that. In theory if the burn load is too low it can lead to velocity variations. Don't just trust GRT though, see what reloading data on reputable websites say for max loads, then compare actual velocity to what GRT says. Its pretty close for my load in my single shot 222, which is slightly over ADI book max.
based on 55,000psi max pressure.Quote:
Originally Posted by bjp
The 52 GRN HP Speers are an awesome projectiles with flat base and huge hollow nose.trebly likes them. I cocked up years back n bought box of 50grn...the same but small hollow pointy nose.they still killed wallabies well and solved headache of 110lb boar that met us on track too...up went rifle and down went pork lol.
In regards to case capacity, my measuring may not be that accurate?? When it has 102% for the 2219 does that mean up to the top of the neck or allowing for the projectile and seating depth/OAL so maybe around the base of the neck? Reason I ask is I loaded them with 22g 2219 and seemed to fit in easy. Hornady has 22.5g for 3000fps. Albeit 5 different projectiles on that page and load dataQuote:
Originally Posted by bjp
Some cases are much smaller capacity than others...as in a whole 2 grns of fine grained 748!!!
102% would be allowing for seating, slightly compressed load. Half a grain case capacity can make quite a difference to pressure for these smaller cartridges. Best thing I've found, if you can, is to chrono a couple of different loads then that can be used to validate GRT model. I always start with published data (typically ADI or Hodgdon, just from habit), down from max, then use that to "calibrate" the GRT model for that rifle/load. I'm typically looking for 90%+ burn, but that doesn't always equal fastest or most accurate load. But I'm not a long range shooter, so pretty happy if I'm getting 1moa or less at 100m. But by the numbers, its still looking like BM2 may be a little slow to get best results.
748 is the magic juice for the triple deuce and has been for years. Due to load another 400 for a mate. He would cut my throat if I suggested another powder.Quote:
Originally Posted by Micky Duck
Jeepers it's up there in price, I'll soldier on with some of these other powders before I go buying that.
Couple of 5 shot groups after trying some 2207 in windy conditions. Try it again next week and see if it repeats.
Attachment 279510
Same loads I use. 19.2 Gr 2207 with 50Gr soft point. Groups like yours
Both very tidy. Just pick one & go hunting.Quote:
Originally Posted by charliehorse
Nah, I might ask Dennis where to from here....
