Have you tested this?
- Thread starter Timo
- Start date
I think 50 m RFBR shooters have been afraid here also the high speed.I havent heard that anybody has tested it to 50 m.
Last 3 x 10 shot group competition winner here shoot with it but it was 100 m.
Maybe to looong barrel men-
And also to winter competitions outside range....
Somebody cut 30 " barrel to 28/26/24/22/20/18/16/14/12" and got thisway results:
30" 1090—> 762 mm Vo 332 m/s
28" 1099—> 711 mm Vo 335 m/s
26" 1105—> 660 mm Vo 337 m/s
24" 1121—> 610 mm Vo 342 m/s
22" 1131—> 559 mm Vo 345 m/s
20" 1140—> 508 mm Vo 347 m/s
18" 1153--> 457 mm Vo 351 m/s
16" 1161—> 406 mm Vo 354 m/s
14" 1149--> 356 mm Vo 350 m/s
12" 1141--> 305 mm Vo 348 m/s
OT thinking: Why we dont shoot I.R.50/50 to 100 yd or 100 m?
I.R100/100 -.
*Shooters wind reading skills rice to top.
*Dont need to be afraid 250/25 X results if target is same as 50/50.
*I think about 200 / few X is winning result then....
BR, Timo
Last 3 x 10 shot group competition winner here shoot with it but it was 100 m.
Maybe to looong barrel men-
And also to winter competitions outside range....
Somebody cut 30 " barrel to 28/26/24/22/20/18/16/14/12" and got thisway results:
30" 1090—> 762 mm Vo 332 m/s
28" 1099—> 711 mm Vo 335 m/s
26" 1105—> 660 mm Vo 337 m/s
24" 1121—> 610 mm Vo 342 m/s
22" 1131—> 559 mm Vo 345 m/s
20" 1140—> 508 mm Vo 347 m/s
18" 1153--> 457 mm Vo 351 m/s
16" 1161—> 406 mm Vo 354 m/s
14" 1149--> 356 mm Vo 350 m/s
12" 1141--> 305 mm Vo 348 m/s
OT thinking: Why we dont shoot I.R.50/50 to 100 yd or 100 m?
I.R100/100 -
.*Shooters wind reading skills rice to top.
*Dont need to be afraid 250/25 X results if target is same as 50/50.
*I think about 200 / few X is winning result then....
BR, Timo
Jerry Halcomb
Administrator
IR50 to 100
TIMO
IR50 to 100 was tried by the originator of IR50/50. It didn’t go over as popularity waned within a year. It was fun but too many felt exasperated after having tiny groups and good scores at 50 yards and meters. 100 was too much of a guessing game in switching winds it seemed. Also the reliability of scopes getting correct and repeatable clicks between 50 and 100 yards was an issue. Most competitors had to make an extra trip to the range to get a zero at 50 yards after a 100 yard match. Scopes are better now.
Per your thoughts on Biathlon ammo. If I remember correctly, a highly regarded competitor won the ARA nationals with Lapua Biathlon ammo in scalding 100 degree Fahrenheit temps several years back. If I’m wrong on the ammo choice, I’m sorry, that is my recollection.
regards
Jerry Halcomb
I think 50 m RFBR shooters have been afraid here also the high speed.I havent heard that anybody has tested it to 50 m.
Last 3 x 10 shot group competition winner here shoot with it but it was 100 m.
Maybe to looong barrel men-
And also to winter competitions outside range....
Somebody cut 30 " barrel to 28/26/24/22/20/18/16/14/12" and got thisway results:
30" 1090—> 762 mm Vo 332 m/s
28" 1099—> 711 mm Vo 335 m/s
26" 1105—> 660 mm Vo 337 m/s
24" 1121—> 610 mm Vo 342 m/s
22" 1131—> 559 mm Vo 345 m/s
20" 1140—> 508 mm Vo 347 m/s
18" 1153--> 457 mm Vo 351 m/s
16" 1161—> 406 mm Vo 354 m/s
14" 1149--> 356 mm Vo 350 m/s
12" 1141--> 305 mm Vo 348 m/s
OT thinking: Why we dont shoot I.R.50/50 to 100 yd or 100 m?
I.R100/100 -
*Shooters wind reading skills rice to top.
*Dont need to be afraid 250/25 X results if target is same as 50/50.
*I think about 200 / few X is winning result then....
BR, Timo
TIMO
IR50 to 100 was tried by the originator of IR50/50. It didn’t go over as popularity waned within a year. It was fun but too many felt exasperated after having tiny groups and good scores at 50 yards and meters. 100 was too much of a guessing game in switching winds it seemed. Also the reliability of scopes getting correct and repeatable clicks between 50 and 100 yards was an issue. Most competitors had to make an extra trip to the range to get a zero at 50 yards after a 100 yard match. Scopes are better now.
Per your thoughts on Biathlon ammo. If I remember correctly, a highly regarded competitor won the ARA nationals with Lapua Biathlon ammo in scalding 100 degree Fahrenheit temps several years back. If I’m wrong on the ammo choice, I’m sorry, that is my recollection.
regards
Jerry Halcomb
When air temperature is 100 degrees Fahrenheit (about 37 C)speed of sound in the air is about 354 m/s (1163 feet/s).
When air temperature is 59 degrees Fahrenheit (about 15 C) speed of sound in the air is about 340 m/s (1117 feet/s).
We have never temperature here 100 degrees (outside) that I cant say what is ammos Vo speed 100 degrees Fahrenheit-.
Maybe I must shoot from sauna window.
Calculator in this link:
http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/souspe.html#c1
BR, Timo
When air temperature is 59 degrees Fahrenheit (about 15 C) speed of sound in the air is about 340 m/s (1117 feet/s).
We have never temperature here 100 degrees (outside) that I cant say what is ammos Vo speed 100 degrees Fahrenheit-
.Maybe I must shoot from sauna window.
Calculator in this link:
http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/souspe.html#c1
BR, Timo
Last edited: