Some chrony results for a CX Storm with NR barrel in .4ocal

Colin

Colin

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Tried out my new chrony last weekend. It was a wet cold day, here are some results, barrel length is 18.5" all strings were 5 shots. Sight was a Bushnell Holosight. Thanks to the wet ground fall of shot was quite noticeable and accuracy was good using a rest, all shots on line.

175gr lead SWC with 4.0gr Titegroup

Lo 1049/ 1030
Hi 1084/ 1095
Avg 1064/ 1074
ES 34.96/ 44.59

At 125-150m rounds, rounds were landing about 1/2 from centre dot to 6 Oclock at the bottom of the reticle circle.

200gr XTP with 3.5gr titegroup

Lo 811/717
Hi 826/761
Avg 821/732
ES 15/ 43
SD 6.32/19
At 125-150m rounds, rounds were landing at the bottom of the reticle circle.

135gr Nosler JHP with 5.8grs Titegroup

Lo 1386/1386
Hi 1417/1422
Avg 1402/1407
ES 30.69/35.50
SD 11.78/13.60

At 125-150m rounds, rounds were landing dead on the centre dot.

155gr XTP JHP with 5.8grs Titegroup

Lo 1333/1300/1305
Hi 2107/1355/1352
Avg 1722/1334/1331
ES 774/54.45/47
SD 43.1/22.78/18.9

At 125-150m rounds, rounds were landing just under the centre dot.


Previous accuracy tests show the 135gr the most accurate of the ammo I have used. I have shot this rifle with a NC Star shot with BDC out to 220m with good accuracy and small beaten area.

Any constructive comments more them welcome. This is the first time I have used a chrony and it was a wet miserable day.

DSCN0785.jpg
 
very cool, thanx for the testing!

I really like those carbines too.

how long does the barrel need to be to be NR on that firearm? if different how long is your barrel?

and wow, over 2100fps!! thats smoking for a pcc!! 155grn bullet at that speed has as much muzzle energy as many rifles!
 
I suspect that the 2107 was a misread, I was getting some odd figures, might have been the rain. I think the stock barrel is 16", this one is 18.5" which makes it NR.
 
oh,ok, yea seems high to me too, but I am new :)

still 15-1700fps with a larger bullet is good power from a supposed "toy"

I think someone needs to rechamber one of these in 7.62x25 :) that would be impressive. 1650fps is a pistol.
 
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