12/4/4
Daystate Huntsman MKII .22 Pellet tests
DRAFT : STILL INCOMPLETE

The results of a set of pellet tests undertaken over Easter weekend 2004.

OK and then later in April (28th). If you are interested in 'big boys toys' have a look at my .308 group testing scans of the targets

I purchased a pellet sample packs (together with the targets) from www.pellpax.co.uk.  This pack consists of 10 of each of 34 different pellet types together with a pre-printed target for each pellet type.

Gun: .22 Daystate Huntsman MKII  
Serial number: 7871
Distance: 20m linear 1.1m uphill
Weather:
    Day 1: cool, slightly overcast, very little wind (0-2 mph), some very light showers - only during one set of pellets.
    Day 2: cool, overcast, gusty at times (25-30mph) average around 10 mph during most tests, no rain showers.
    Day 3: cold, overcast, gusty at times (25-30mph) average around 10 mph during testing, n o rain.

Shot from a seat with a "thumb stock" stick as the front mount (think on it as a bench).  

10 pellets per set shot at a single target, documented, target changed repeated.  In cases of "strange" results and at intervals a CONTROL set of 10 pellets of H&N Hobby was fired.  The order of firing is as numbered below.  

The results are presented in three ways:
The Radius measure is a quick way to measure pattern spread but does not really allow for "1 bad shot".

The "Centre of Gravity" (COG) is a more complex technique, but it is a better measure of the density of the shot.  A single bad shot will show as a bad radius but a decent COG, 10 shots spread over the entire target may also show the same radius but have a much larger COG.  10 shots within a small area will have a small radius and a small COG.  Rather than present a COG as an (x,y) pair I have simply shown the euclidean distance of the COG from the "centre" of the shot pattern.

Note that both the Radius and the COG pattern measure are taken around the centre of the shot pattern, this neatly avoided any need to have the sights zeroed for the different weights and flight characteristics of the pellets.
  
In summary, a low radius is good, but a low COG is better,  perhaps I should train the progrma to remove the worst two shots and compute the COG on the resulting set?

Anyway, the statistics could be argued about for a long time and we could give medians mode and std deviations of the numbers too - perhaps one day.  I think most prople will agree that the lower the COG the "better"the target cluster appears to be.

Generally the "double waisted" pellets seemed to perform poorly in this rifle, there is - as yet - in sufficient information to perform an analysis of pellet type, weight, size etc.

Has anyone else done something similar (and published the results?) for any of their guns?



 Pellet
 Size
(mm)
 Weight
(gr)
 Notes
 Radius
(mm)
 COG
 PICTURE
1
 Milbro Select
5.5
 14.15
 150bar start
 23
 144
 target
2
 Eley Wasp
 5.6
 14.40
12
 59
 target
3
 Air Arms Field
 5.51
 16.10
8
 33
 target
4
 H&N Field & Target Trophy
 5.5
 14.66
11
 50
 target
5
 Wembley Harrier
 5.5
 12.3
 "double waisted"
 41
 258
 target
6
 CONTROL Hobby

Gun down to 130 bar upped to 180bar.  Sister appeared and loosed off 25 magnums.  Youngest son appeared and loosed off at some chalk targets.
 22
 103
 target
7
 Milbro Jet
 5.5
 13.35
 "double waisted"
 39
 151
 target
8
 Milbro Caledonian
 5.5
 13.3
38
 194
 target
9
 SMK
 5.5
 14.2
 Very light rain for a few mins.  No appreciable wind.
 16
 77
 target
10
 Bisley Premier
 5.5
 17.0
 Seemed rather wild - refilled gun from 130 bar to 180 bar after 6 shots, but the last 4 shots were just as random
 48
 220
 target
11
 CONTROL Hobby

Hobby x 10 to confirm that the above was not a fluke
22
 72
 target
12
 H&N Coppa-Point
 5.5
 16.2
 Tight fit into barrel - all landed low
 36
 316
 target
13
 Wembley Hustler
 5.5
 12.4
70
 605
 target
14
 CONTROL Hobby

finishing off for day.  Upper group
 20
 85
 target
15
 CONTROL Bisley Magnum

My usual load - again just to ensure that all was A OK

Lower grouping
 14
 25
 target




12/4/4 windier, no rain


16
 Control Bisley Magnum

170 bar at start of day
 14
 66
 target
17
 H&N Pointed
 5.5
 16.2
19
 92
 target
18
 Crosman Matchpell (pest control)
 5.5
 14.3
13
 60
 target
19
 Baracuda Match Extra Heavy
 5.5
 21.14
 Looked good
 9
 31
 target
20
 H&N Match-Kugeln
 5.5
 13.74
23
 130
 target
21
 Crossman Power Pell
 5.5
 14.3
 Disturbed on 1 shot by my dog - removed from set
 14
 59
 target target
22
 Milbro TR
 5.5
 14.3
11
 48
 target
23
 Webley Lazadome
 5.5
 16
 Refilled to 170 before this test
 12
 102
 target
24
 Webley Venom
 5.5
 16
 lazapoint
 13
 64
 target
25
 Bisley Pest Control
 5.5
 18.2
30
 113
 target
26
 Daystate
 5.52
 15.9
12
 72
 target
27
 Crosman Accupell
 5.5
 14.3
16
 95
 target
28
 CONTROL Hobby


18
 95
 control target




Due to misnumbering there was no "29 set"


30
 Webley Lazapell
 5.5
 14.5
 down to 130bar refilled to 170 bar before this test
 12
 42
 target
31
 Eley Wasp
 5.5
 14.5
11
 53
 target
32
 H&N Silhouette
 5.5
 16.4
 Unsure about these would like to try more
 23
 99
 target
33
 Air Arms Hunter
 5.5
 16.0
9
 57
 target
34
 Bisley Superfield
 5.5
 10.8
15
 61
 target
35
 Crosman Premier
 5.5
 14.3
10
 42
 target
36
 Air Arms Field
 5.52
 16.1
11
 38
 picture
37
 CONTROL Hobby

pressure down to 120bar by end of this sequence
 11
 50
 control
38
 New Bulldog
 5.5
 14.5
 was 150 bar upped (after these) to 170bar
 22
 105
 target
39
 Bisley Practice
 5.5
 13.6
15
 79
 target target
40
 Bisley Long Range Gold
 5.5
 14.0
 Very tight
 9
 38
 target
41
 H&N Hollow point
 5.5
 15.7
16 69
 target
42
 Bisley Magnums
 5.5
 21.4
11
 43
 target#
43
 Dynamic Air Bullets PCP2 5.54
 5.54
 14.5
 I have been told to clean the barrel and then NOT to use lube on these. I'll test when I have time.
20
 109
 target#
44
 Control Magnums


11
 55
 target#
45
 Dynamic Air Bullets PCP2 5.56
 5.56
 14.5
 I have been told to clean the barrel and then NOT to use lube on these. I'll test when I have time.
12
 31
 target#









http://www.scotnet.co.uk/jon/guns/Pellet_tests.html