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All Springer/NP/PCP Air Gun Discussion General
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PCP/CO2/HPA Air Gun Gates "The Darkside"
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TJ spec and price guide?
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Topic: TJ spec and price guide? (Read 7515 times))
UnderPressure
Expert
Posts: 1109
Re: TJ spec and price guide?
«
Reply #20 on:
August 16, 2020, 12:39:15 AM »
Lets say that someone gets a 1 in 20" twist barrel liner (either the Redman's .223 or the TJ's .222) and they found out that even at 900 FPS they don't have good accuracy with NOE 38 grain CC1 at 200 yards.
Then what?
Begin to the process of decking of NOE 38 grain CC1? Then test.....if still inaccurate then deck NOE CC1 further.
P.S. With NOE 38 grain CC1 being a .22LR bullet its roundnose has a flat drag curve up to around 1000 FPS (see RA4 in chart below):
https://airgunguild.com/ask-bob/what-is-the-ballistics-coefficient/
So it really does make sense to shoot (and optimize) for at least 1050 FPS.
«
Last Edit: August 16, 2020, 12:51:35 AM by UnderPressure
»
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KnifeMaker
GTA Senior Contributor
Posts: 8224
yes
Real Name: Michael
Re: TJ spec and price guide?
«
Reply #21 on:
August 16, 2020, 05:55:05 PM »
If you could eve actually hold one in your hands, you would soon realise it is a spire point. It has a very tiny point I will not eve use in on vermin as it is a pin ^#(*%, with animals running off to die slowly. I may send one of the molds out ot HP mold services for hp work. It is very accurate.
I know of no .22 rf round that has such a finely tapered point. None. So run the calculations as a Spire Point.
Not that sub-sonic makes much difference. LOL
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Central Texas
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