Rainy day HPA accuracy tests (way-long)

[ribbonstone]

Got the date wrong on some targets...changing the year screws up old folks.  Pictures should enlarge if you click on them.

Dull rainy day, limiting my shooting to 17 yards and giving the chronograph fits.  Wanted to test the better pellets from earlier tests.  With the converted .177  AR2078 (converted to run on 850psi HPA) looked like heavier weight pellets wee the choice, so tested the four heavy weights I had on hand (from 11.2gr. to 9.3gr.).  This rifle run runs at about 12-12.5 foot pounds (more energy with the heavy weights).


Looks like a two-pellet gun.  Will either use the RWS Supermag wad cutters or the Kodiaks for anything serious.
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Also tested a QB78 conversion to 5mm and then converted to 850PSI HPA.  this one also seemed to like the heavy end of the pellet offerings as well as match wad cutters (there is only one choice in good 5mm  WC’s).  This one is set to run at 13-13.5 foot pounds mostly because i’m use to Sheridan pumpers, and wanted something in about the same power range ( I just do all the pumping before shooting, rather than pump-shot-pump-shot).



Here are some older tests of the same rifle, only one group for each pellet type and at a slightly longer distance.


Looks like this one  is going to get a lot of Benjamin Cylindrica.  THese aen’t the most accurate pellet, but accurate enough and available locallyl.

Am a confirmed pumpaholic, like the idea of doing the work myself...past middle age, so a simple work out with a nice pay off at the end makes shooting MORE enjoyable.

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Still raining...so tested another HPA Qb conversion with some odds-n-ends pellets.  this one is a converted QB79, made into a 16” barreled carbine using an RWS brake.  Set to a pretty mild 10.5 foot pounds for back yard use.  Has always preferred wad-cutters; evidently it still does.



Older testing at 25yards  also showed a preference for Super Domes.

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Is raining again today, off and on, so I’ll get to test the QB78D .25 conversion at 17yards.  So far, this rifle has had three lives.  First it ran on c02, then on 850PSI HPA, and now on 1200PSI HPA.  Power has gone up each time, but the preference for Kodiak pellets seems to remain the same.

Right now, this ne is set up to give 31-32 foot pounds when using Kodiak pellets, will earn a bit less with lighter weight pellets.  It also has the ugliest wood of all the QB’s (so far).


CO2


 850PSI  HPA



And today’s test, of 1250PSI HPA air:



Just in case you need a visual on the real differnce between .25 and .177 Kodiaks:



Shot counts:

.177-850psi - 12 foot pounds = 70shots from  3K to 1K
.20 -  850psi - 13.5 foot pounds = 60 shots from 3K to 1K
.22 -  850psi - 10.5 foot pounds = 70 shots from 3K to 1K
.22 - 1250psi - 31 foot pounds = 30 shots from 3K to 1.3K

Accuracy:
1. At 17 yards, which is kind of close, all of them found something that shot under 1/4”. Factory issue barrel, shortened factory barrel, HW barrel, or LW barrel...they all had at least one pellet that would shoot very well.
2. Never count the Kodiak pellets out of the running for top accuracy honors.
3. The little numbers on your scope lie.  Take the time to confirm the AO setting by the “head bob-n-weave” method.

[DanoInTx]

Good results!  Confirms what I've always known, gas guns like the Kodiaks 9/10 times, just a bummer that once you stretch them out to a long distance they get a bit loopy.  I recently ran about 8 different pellets through my AA S400C 12fpe version and the Kodiaks even at somewhat close range (15 yards) beat the heck out of anything else I tried including JSB 4.50's, JSB 4.52's, Crosman Premeir lights and Crosman Premier Heavies.  My old BAM B51 liked Crosman Heavies more than the Kodiaks though for some reason, but that was an odd bird:)

[gamo2hammerli]

Great shooting and testing with the HPA guns.  The .177 looks real puny next to the .25.