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Thread: Pellet testing

  1. #1
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    Default Pellet testing

    Here's something that I was busy with the last few weeks. I tested 33 pellets with 8 different rifles. I don't know how meaningfull it will be to most, but it helped me pick the best pellet for each rifle.

    PELLET TESTS 5 SHOT GROUPINGS AT 20 Yards (18.3m) - Measurements in millimetres center to center (CTC)
    PELLET Weight gr GAMO REALTREE HUNTER GAMO CF-30 GAMO VIPER DESERT GAMO CF-X ROYAL DIANA PANTHER 31 DIANA 350 MAGNUM INDUSTRY BRAND AR1000 HATSAN MODEL 125
    CROSMAN SILVER EAGLE HOLLOW POINT 4.8 46 33 68 26 40 17 21 70
    GAMO RAPTOR PBA 5.2 35 25 25 20 20 25 90 90
    SKENCO TYPE 1 5.7 46 16 25 17 50 100 50 90
    SKENCO STEEL FIST 6.0 48 90 90 22 90 100 33 90
    PROMETHEUS YELLOW 6.0 27 30 53 45 100 100 100 90
    SKENCO TYPE 4 - BLACK MAX 6.4 32 9 27 21 70 100 20 90
    PROMETHEUS DYNAMIC TRIPLE P1 6.9 27 10 30 27 31 10 42 90
    H&N HOLLOW POINT 7.1 24 19 14 18 16 28 24 50
    GAMO EXPANDER 7.7 13 15 14 13 11 22 30 29
    GAMO PRO MATCH 7.8 13 13 15 10 25 24 21 27
    GAMO PRO MAGNUM 7.8 9 25 9 23 48 59 20 62
    GAMO PRO HUNTER 7.8 11 14 22 16 16 42 13 21
    CROSMAN ACCUPEL 7.9 15 17 15 14 12 18 30 16
    CROSMAN POWAPEL 7.9 15 50 17 34 40 16 13 22
    PROMETHEUS DYNAMIC SN-1 7.9 9 10 16 20 11 15 25 22
    CROSMAN COPPERHEAD HUNTING 7.9 11 13 14 18 10 11 17 31
    CROSMAN COPPERHEAD PLINKING 7.9 14 13 18 42 13 59 50 10
    CROSMAN DESTROYER 7.9 14 19 25 16 17 24 14 18
    CROSMAN PREMIER HOLLOW POINT 7.9 17 23 14 18 11 18 19 21
    PROMETHEUS PARAGON P7 GREEN 8.0 24 10 47 21 10 20 24 100
    JSB PREDATOR 8.1 25 6 23 8 15 9 14 11
    JSB EXACT 8.4 8 28 13 6 10 15 13 26
    AIR ARMS DIABOLO FIELD 8.4 20 13 18 18 9 9 17 15
    H&N NEUE SPITZKUGELN 8.5 12 26 17 22 29 25 26 18
    H&N CROW MAGNUM 8.8 10 11 15 15 7 15 26 13
    DIABOLO BOXER 9.4 13 22 17 8 13 8 29 12
    GAMO ROCKET 9.5 17 20 13 7 25 18 29 30
    PROMETHEUS EXTERMINATOR EX-1 9.5 28 10 40 22 27 10 14 20
    JSB EXACT HEAVY 10.3 14 19 12 17 13 6 66 16
    GAMO TS-10 10.4 13 36 17 26 121 50 127 16
    CROSMAN PREMIER ULTRA MAGNUM 10.5 17 30 15 14 18 13 17 11
    H&N BARACUDA EXTRA HEAVY 10.6 10 16 14 9 12 10 40 8
    H&N SILVER POINT 11.6 31 12 20 14 20 14 13 12
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  2. #2
    Sharp Shooter
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    very interesting indeed.

    gotto love the hatsan and diana groupings of 10cm with the lighter pellets. But what confirms suspitions is the CFX Royal outgrouping all including the 31 panther. what is strange though is the good groupings achived with Boxer and Rocket. Have some of those Boxers. They seem to work well in my erb as well.

    ooo and lets not forget the hatsan getting a 8mm ctc with baracuda extra heavies.. Seems if you can slow her down you may still be able to group her. Also interesting is the way that Gamo pellets seem to group better in Gamo rifles.. wonder what the reason is for that.. If the spread of rifles were bigger this would have served as an amayzingg database
    Last edited by JTK; 04-12-08 at 10:40.
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  3. #3
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    I think get the most promising pellets and do another test with 10 shots at least 35m. Sometimes 5 shots might be showing some deceiving results and 20m is a bit too close.
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  4. #4
    Sharp Shooter
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    fish.. I aggree 20m is short but what will the grouping look like at 40m if it is 10cm @ 20m
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  5. #5
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    The interesting part to me is that the JSB Predators got a group size of only 6mm, exactly that of the JSB Exacts! That is your best grouping for the complete test. It just shows that everyone should do this test to see what pellet works best in his gun.
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  6. #6
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    Well, that's why he can do another test using only the most promising pellets and not all of them. I think some brands are stable up to 30m but after that they become unstable.
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  7. #7
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    Quote Originally Posted by Ettienne1 View Post
    The interesting part to me is that the JSB Predators got a group size of only 6mm, exactly that of the JSB Exacts! That is your best grouping for the complete test. It just shows that everyone should do this test to see what pellet works best in his gun.
    Not only that but if the power of the rifle changes, you need to re-test. While new my HW97K was grouping best with JSB but after it settled down the power went down and now it groups best with AA.
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  8. #8
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    Thanks for that Van it saved me alot of trouble, but would love to see them at 30-40m
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  9. #9
    Sharp Shooter
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    I dont claim to know but would imagine that a pellet is stable or not. the effect of the instability may just be logarithmically amplified as the distance goes by. Same as with pellet drop due to decrease in speed and increase in distance.
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  10. #10
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    Yes, that is why I dont shoot with Hollowpoints at ranges more than 30 metres. Then JSB's and Crosman Premiers come into its own.
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  11. #11
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    Sorry typing error. I dont shoot with hollowpoints further than 30 meters.
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  12. #12
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    Hey, JTK the groupings aren't 10cm, it's 10mm. I'm busy with expanding the range of rifles, to better and more expensive, but trying to stay in a bugget. I started testing at 35m now with the top 5 from the 20m tests. I will publish the results one day. I can say however that the groupings didn't open up as much as I expected. I still get to 10mm with the best.

    The Hatsan and Diana 350 groupings with the light pellets also fascinated me, but they were all high and mostly to the right. I double checked most of the results on the unexpected groupings, so I am pretty confident with my numbers. The light pellets was only tested for academic purposes in the Hatsan and Diana 350, and even though some they group well on an individual basis, they all have the groupings far from each other on the target. I would not use them at all for the sake of longevity of the rifles. The heavy pellets all group close to the aim point.

    I was also surprised with the Boxers. I thought all pointed pellets were crap. I also noticed that the Gamo pellets did well in the Gamo rifles. Might have something to do with the barrel testing in the factory. I assume they would use theur own pellets.
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  13. #13
    Sharp Shooter
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    Hi Van, was refering to the 90 to 100mm groupings when I said 10cm.. Those wont hit the target @ 40m
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  14. #14
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    My Biggest surprize so far is the Hatsan 125 at 35m with a grouping of 8mm with 8,8gr H&N Crow Magnums. I re-tested with a 10 shot grouping and got 14mm if I exclude one flyer that took it out to 21mm. The reason I'm so surprized is:

    1 - It's a Hatsan
    2 - It's THAT Hatsan (125)
    3 - It's a relatively light (8,8gr) pellet for the power
    4 - The scope is still on
    5 - The scope is not yet broken
    6 - The gun is still in one piece

    Seriously, I bought the gun as a novelty item. I thought R2685-00 (new) was a financial sacrifice I was willing to make in the interests of science. I wasn't expecting anything from it. It is generally known as a complete dog in the airgun fraternity. If I can make any conclusions from my experience, it is that the thing is holding up because I regularly check all the screws on the gun. And before fitting a scope, make sure the screws holding the rail on are tight (not overtight). Picture included.
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  15. #15
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    Hi JTK, sorry, now I follow. I won't even try to hit anything at 40m with those ones grouping 10cm at 20m.
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