The last match of our indoor season saw some interesting twists & turns. First through third in

LV relay 1 saw a three way tie broken by X count. One shooter learned the importance of

scanning the target to ensure all bulls were shot. Ron shot a nice 750 in HV & Frank shot a

great 749 in LV in relay 2 with his new to him Thomas.

Shooter Class Equipment Tar. 1 Tar. 2 Tar. 3 Total

Relay I

Dick Strever LV Thomas BR .177 249 16x 249 16x 248 14x 746 46x

Chris Lovitt LV A.A. S400 MPR .177 248 12x 250 14x 248 8x 746 34x

Steve Ware LV R.A.W. BM500 .177 248 10x 248 11x 250 12x 746 33x

Bill Davis LV A.A. S400 MPR .177 245 5x 239 4x 236 8x 720 17x

Ron Silveira HV Thomas BR .177 250 14x 250 15x 250 16x 750 45x

Tom Santos HV Feinwerkbau P70FT .177 249 12x 248 13x 250 15x 747 40x

Tony Farcello HV Feinwerkbau P70FT .177 247 11x 245 6x 248 10x 740 27x

Frank Kodl Opn Thomas BR .177 249 9x 209 10x 243 6x 701 25x

Relay II

Frank Kodl LV Thomas BR .177 249 13x 250 9x 250 15x 749 37x

Chris Lovitt LV A.A. S400 MPR .177 247 8x 245 8x 246 6x 738 22x

Ron Silveira HV Thomas BR .177 249 17x 249 16x 249 19x 747 52x

Dick Strever HV Thomas BR .177 248 14x 249 15x 250 17x 747 46x

Tony Farcello HV Feinwerkbau P70FT .177 249 9x 246 9x 247 11x 742 29x

Next rifle competition will be Outdoors May 10 beginning at 9:30 am.

Steve Ware, Match Director ]]>

For these tests I used my RAW BM500 with poly barrel, Randolph front rest/rear bag, shooting JSB 13.4gr Monsters at HV power level. The barrel was cleaned as it is for matches (1 wet / 2 dry patches), with 5 "throw away" shots to stabilize before firing test shots. Each run consisted of 20 test shots over a chronometer, aiming at points on a graph paper target (see image). Each group of 20 consisted of 10 shots from left to right and 10 (above the first row) from right to left. There was no attempt to hold off for breezes that occurred, and I used a flag to indicate when wind was calm enough to shoot.

The tests were meant to check the effect of velocity (FPS) on vertical POI, and also the effects of pellet sorting (two batches of Monsters were sorted by a friend: weighed and air-gauged, the same as he uses in matches).

The bottom two 20-shot strings were shot with Monsters out of the can, from a lot which shoots well in my gun. The top two 20-shot strings were shot with my friend's sorted pellets.

After shooting, I used a magnifier to estimate the vertical POI distance from the horizontal POA line (X-axis). The small increments on the graph paper were 1mm, and I was able to estimate down to 0.5mm. These up (+) and down (-) POI-POA measurements were paired with the respective shot velocity from the chronometer. These measurements were then analyzed with statistics.

Here are the means (average FPS), standard error, and standard deviation (variance) of the four 20 shot groups (st1,2 out of the can, st3,4 sorted):

Descriptive Statistics: st1, st2, st3, st4

Variable N N* Mean SE Mean StDev

st1 20 0 783.85 0.805 3.60

st2 20 0 784.20 0.863 3.86

st3 20 0 783.90 0.732 3.28

st4 20 0 787.60 0.407 1.82

>>st4, one of the sorted group, had higher velocity and lower variance in velocity than the other three - which were about the same.

Here is the same analysis for vertical POI-POA distance:

Descriptive Statistics: POI1, POI2, POI3, POI4

Variable N N* Mean SE Mean StDev

POI1 20 0 -0.350 0.264 1.182

POI2 20 0 0.900 0.282 1.263

POI3 20 0 -0.125 0.294 1.317

POI4 20 0 0.500 0.281 1.257

>Note that on average POI2 shot highest (0.9mm above x-axis), even though POI4 shot fastest (about 4FPS faster). Also note that even though st4 had the lowest standard deviation of FPS, it's POI standard deviation was not the lowest.

Next I pooled data from the four strings, and looked at only POIs that were either above or below the x-axis (disregarding those that hit vertically dead-on, at zero). Here is a comparison of the mean FPS for the Up POI vs Down POI:

Two-sample T for up FPS vs dn FPS

N Mean StDev SE Mean

up FPS 36 785.67 3.58 0.60

dn FPS 26 784.69 3.38 0.66

>>As expected, for all shots velocity was higher if POI was above the line than below the line - though different only by 1FPS.

Here is another statistical test (ANOVA) comparing POI for the four 20-shot groups:

One-way ANOVA: st1, st2, st3, st4

Source DF SS MS F P

Factor 3 197.6 65.9 6.29 0.001

Error 76 796.4 10.5

Total 79 994.0

S = 3.237 R-Sq = 19.88% R-Sq(adj) = 16.72%

Individual 95% CIs For Mean Based on

Pooled StDev

Level N Mean StDev --------+---------+---------+---------+-

st1 20 783.85 3.60 (------*------)

st2 20 784.20 3.86 (------*------)

st3 20 783.90 3.28 (-------*------)

st4 20 787.60 1.82 (------*------)

--------+---------+---------+---------+-

>>Again we see the first 3 groups are almost identical (in mean velocity and variance of velocity), but one of the sorted groups st4 had higher velocity and less variance. You might think this would translate into smaller POA-POI. So to test this I compared the absolute value of POI-POA to see which, if any, group did best:

One-way ANOVA: |PO1|, |PO2|, |PO3|, |PO4|

Source DF SS MS F P

Factor 3 2.284 0.761 0.99 0.402

Error 76 58.438 0.769

Total 79 60.722

S = 0.8769 R-Sq = 3.76% R-Sq(adj) = 0.00%

Individual 95% CIs For Mean Based on

Pooled StDev

Level N Mean StDev -------+---------+---------+---------+--

|PO1| 20 0.8500 0.8751 (----------*----------)

|PO2| 20 1.3000 0.8176 (----------*----------)

|PO3| 20 0.9750 0.8656 (----------*----------)

|PO4| 20 0.9500 0.9445 (----------*----------)

-------+---------+---------+---------+--

0.70 1.05 1.40 1.75

>>The best group was the first one shot (from the can), with mean |POI-POA| of 0.85mm. The most consistent velocity sorted group (PO4) was second best. PO2 - which had a 3.5mm "flyer", shot worst.

Since score is based more on big misses than small, for I compared the absolute POI-POA of the worst 3 misses for each group:

|PO1||PO2| |PO3||PO4|

1.5 2.5 3 3

2.5 3.5 2.5 2.5

1.5 1.5 1.5 2.5

5.5 7.5 7 8 (sum)

Interestingly the sorted pellets (POI3 and 4) had the most mms of vertical miss, and the tightest velocity group PO4 had the most mm of all.

//////

These tests suggest that pellet sorting has less effect on vertical POI than other factors (barrel, breeze, etc). They also show very little correlation between vertical POI and FPS velocity. So within limits, ultra-low ES may not contribute to accuracy.

Kim

Edit: I forgot to mention that st4 had the lowest ES = 8. The others were in 12-16 range

There was some excellent shooting today. Congratulations to Dick Strever & Chris Lovitt for

shooting the illusive 750 scores. Ron Silveira took the HV win in the first relay by X count. Dick

had LV with his 750. Ron came back to win LV in the second relay & Chris took HV. It was a

pretty full house with 8 shooters on the line. It was good to have our costal travelers back!

Shooter Class Equipment Tar. 1 Tar. 2 Tar. 3 Total

Relay I

Dick Strever LV Thomas BR .177 250 14x 250 16x 250 15x 750 45x

Mike Aber LV Thomas BR .177 250 9x 248 7x 248 6x 746 22x

Steve Ware LV R.A.W. BM500 .177 249 7x 244 13x 247 11x 740 31x

Bill Davis LV A.A. S400 MPR .177 241 6x 239 3x 234 3x 714 12x

Ron Silveira HV Thomas BR .177 249 13x 248 16x 248 16x 745 45x

Tom Santos HV Feinwerkbau P70FT .177 249 12x 249 14x 247 10x 745 36x

Frank Kodl HV Thomas BR .177 247 8x 246 6x 250 11x 743 25x

Chris Lovitt HV R.A.W. TM1000 .177 241 7x 246 10x 250 12x 737 29x

Tony Farcello HV Feinwerkbau P70FT .177 243 5x 247 11x 246 11x 736 27x

Relay II

Ron Silveira LV Thomas BR .177 249 14x 250 9x 249 11x 748 34x

Mike Aber LV Thomas BR .177 244 4x 247 11x 248 6x 739 21x

Chris Lovitt HV R.A.W. TM1000 .177 250 19x 250 16x 250 14x 750 49x

Dick Strever HV Thomas BR .177 250 19x 250 16x 249 16x 749 51x

Tony Farcello HV Feinwerkbau P70FT .177 247 12x 246 12x 249 7x 742 31x

Frank Kodl Opn Thomas BR .177 246 7x 249 8x 247 10x 742 25x

Next rifle competition will be Indoors April 26 beginning at 9:15 am.

Steve Ware, Match Director ]]>

See you Saturday,

Todd ]]>

Match 1 Results:

LV:

1) Doug Miller, 245-7x, 243-9x, 246-4x, = 734-20x, Steyr

2) Vipha Miller, 245-4x, 237-7x, 238-6x, = 720-17x, Thomas

3) Dennis Kunkel, 239-4x, 234-2x, 239-4x, = 712-10x, AA

4) Bill Tramel, 238-4x, 238-10x, 232-4x, = 708- 18x, AA

5) Tim McMurray, 229-3x, 212-2x, 234-5x, = 675-10x, USFT

HV:

1) Kim Zussman, 247-10x, 249-12x, 247-7x, = 743-29x = Rapid Air

2) Wayne Morimoto, 246-13x, 247-10x, 243-8x, = 736-31x, Thomas

3) Bob Graybill, 243-5x, 247-10x, 241-8x, = 731-23x, Rapid Air

4) Lou Fontana, 245-4x, 224-2x, 234-2x, = 703-8x, Thomas

US Open:

1) Kory Zussman, 232-3x, 227-2x, 235-3x, = 694-8x, Rapid Air

Match 2 Results:

HV:

1) Kim Zussman, 249-6x, 249-10x, 247-7x, = 745-23x, Rapid Air

2) Bill Tramel, 245-7x, 246-8x, 247-5x, = 738-20x, Thomas

3) Bob Graybill, 240-4x, 243-7x, 245-11x, = 728-22x, Rapid Air

4) Dennis Kunkel, 243-5x, 241-5x, 244-9x, = 728-19x, Rapid Air

5) Doug Miller, 233-1x, 242-3x, 249-11x, = 724-15x, Thomas

6) Vipha Miller, 241-6x, 231-2x, 239-5x, = 711-13x, Thomas

US Open:

1) Kory Zussman, 234-4x, 235-3x, 234-6x, = 703-13x, Rapid Air

Thanks for the Help scoring and cleanup.

Next Match 5-14

Regards,

Joe ]]>

The Salem Pistol and Rifle Club is located at 416 Black Creek Rd in Salem NY, about 5 miles west of Vermont, an hour northeast of Albany(nearest airport). We have 16 concrete benches on our 80’ firing line and ample room for cleaning and equipment storage behind the firing line, with plenty of parking space. A limited number of camping spaces will be available without hookups. There are several Bed and Breakfast Inns in the Salem area, two small motels in Cambridge (approx. 10 miles South of Salem) and more lodging options 25-45 minutes from the range across the border in Vermont and to the west in the Saratoga Springs and Glens Falls areas. A complete list of lodging options will be posted asap.

This event was approved by the BOD of USARB a week ago and by the Salem Pistol and Rifle Club just this evening so plans are just beginning. I will post updates as plans solidify, and will have a registration form with match fees (most likely the same as last years) available asap.

Looking forward to a memorable Nationals,

Todd Banks-Pres., Salem Pistol and Rifle Club

TKBanks98@aol.com, 518-796-0768 (please leave a message and I'll get back to you) ]]>

High winds cancelled the ferry so Stu didn't make it. Dave had a foot of snow. At Holbrook was just going to be rain and high winds. The heat in the range went out again but was in the low 30's. We had a lake in the range that didn't help. Another Great day shooting airguns.

Thanks for Robert for all the food and Chris and Mark for scoring.

Springer Class

Chris Sloan FWB-300 .177 240 2X, 246 4X, 239 4X, 725 10X

LV Class

Mark Marini Thomas .177 249 9X, 247 13X, 250 8X, 746 30X

Mark Marini Thomas .177 247 10X, 250 10X, 248 5X, 745 25X

Howard Williams Walther .177 224 7X, 239 7X, 245 6X, 708 20X

Howard Williams Walther .177 227 5X, 234 6X, 241 7X, 702 18X

HV Class

Chas Dicapua RAW TM-1000 .177 249 16X, 249 15X, 249 16X, 747 47X

Chas Dicapua RAW TM-1000 .177 248 8X, 248 16X, 250 15X, 746 39X

Chris Sloan RAW TM-1000 .177 246 6X, 241 7X, 247 8X, 734 21X

Robert Fisher RAW TM-1000 .177 242 5X, 239 4X, 244 10X, 725 19X

Robert Fisher RAW TM-1000 .177 231 3X, 240 3X, 237 5X, 708 11X

Frankie Monroe MRod testing pellets

Open Class

Paul Bendix Thomas .177 250 17X, 249 16X, 250 16X, 749 49X

Next shoot May 6. ]]>