#1
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Shooting Berger 55 grain (.20 cal.) from a .223 case?
Is anyone shooting the Berger 55 grain VLD .20 cal. bullet from a .223 case? If so, what velocity are you getting? I would like to get some idea what kind of velocity I can get shooting the Berger .20 cal. 55 grainers with a 8.5 twist barrel in .20 Tactical and a 23" barrel.
Thanks, Jordan |
#2
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Quote:
This particular 8 twist wasn't quite enough to reliably stabilize the 55 though Velocity was 3300 with a stout load of TAC. |
#3
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55
will be shooting some 55grs in a 20 Practicle in the next few days over the new Labradar chrony I will report back our findings for you.. SX
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#4
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Thanks gentlemen. Super X, I'll be interested to hear your results.
TIA, Jordan |
#5
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just doing load dev for a 204 with 55g bergers in a 27" 1:8 twist barrel.
Really impressed. 26g of AR2206h (Hodg 4895) giving 3300 fps and no signs of pressure yet. Sweet spot seems to be around 3250 with 3 shot 100m groups going around 0.2" The 55g berg has a BC or 0.38 so about the same as 6mm 87vmax and a 243 is hard put to get the 87 going at 3200 so the 204 shooting 55g is going to be much flatter shooting than I thought! That 55g VLD is probably the only one thats light enough to expand on small same. 95-105 vld's are no good on light game in the 6mm. |
#6
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The updated bc for the 55 is .354 and optimal twist is rated as a 7.
Using an 8 twist 204 sized case might work if it's not too cold out but my guess is you're compromising a substance amount of the BC of that bullet using it in a small case. I personally think the 55 is geared more so for the big 20s like a 20-250 or a 20x47L using at least an 8 twist. My 20-250 with a 9 stabilized well until it was below about 35 degrees. Then accuracy began to suffer I believe the 8 twist 204 I have also had a hard time with the 55. The 50 Berger is amazing in the same gun. Wish they still made them. Unmusigs work very well in place of the Berger. |
#7
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I shoot 55's in an 8 twist 20BR BUT with a short barrel. I get 3240fps and its been stable when I shot it. Never shot it in really cold temps. Hopefully I get to this winter.
Aaron |
#8
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5X45AI,.20 Practical AI or.20-.223AI your choice. 28" 8 1/2tw 55 grain Berger Reloader 17 3640 fps MV. Very accurate and great terminal ballistics to 600+ yards. I come out of hibernation in April and back in on Thanksgiving day so cold temperatures have not been verified. Most shooting is done in the 600 feet above sea level.
__________________
"That which does not destroy me, has made a huge tactical error" |
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