Ammo: Pellet or Slugs?  

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Oledawg
(@oledawg)
Joined: 1 year ago
Posts: 2
2018-09-05 19:42:11  

Howdy all, new to the group, new to benchrest. I have an FX Crown in .22. I have check the US and International benchrest rules and I cannot find (probably just missed it) any rules about ammo that would only allow pellets or that slugs are not allowed. Any clarification would be appreciated. 

Nick


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strever
(@strever)
Joined: 2 years ago
Posts: 27
2018-09-06 12:45:58  

WRABF & ERABSF rule

B.7 Ammunition
Rimfire Ammunition must be a lead projectile in .22 Target Rimfire short, long, or long rifle calibres
Air Rifle ammunition must be a lead pellet in calibre .177 .20 or .22
 
dangit hit enter before i finished
 
WORLD & EUROPEAN RIMFIRE & AIR RIFLE BENCHREST RULES 2013-2021
Page 16
Common JSB Exact pellets of all calibers (4.52, 5.0, 5.5 mm) for LV class
and Heavy version of JSB Exact pellets for HV class to be used.
A sequence of 5 shot to be measured by a chronograph (averaged velocity of 5 shots).
Minimum pressure in competitors air cylinders will be 190 bar before the test can take place.
As current high quality chronographs state an accuracy level of 99.5%, a 0.5% +/- tolerance level will be allowed.
Kinetic energy (ft/lbs) = weight (grains) x speed (ft/sec) x speed (ft/sec)/450240 or Energy (Joules)=weight (kilograms) x speed (m/sec) x speed (m/sec)/2
To verify the power of the 16.27 Joules (12 ft/lbs) or 27.12 Joules (20 ft/lbs) maximum Air Rifles must be tested by the following procedure:
 .177 JSB Exact Pellet of 4.50 - 4.52mm in diameter and 8.44 grain/0.547 gram in weight must be used for LV class = max velocity of 800 fps and energy of 12 ft lbs/max velocity of 243.84m/s and energy of 16.27J
 .177 JSB Exact Pellet of 4.50 - 4.52mm in diameter and 10.34 grain/0.67 gram in weight must be used for HV class= max velocity of 933.2 fps and energy of 20 ft lbs/max velocity of 284.44m/s and energy of 27.12 J
 
 .20 Match Pellet of 5.00mm in diameter and 13.73 grain/0.89g in weight must be used for LV class= max velocity of 627.30 fps and energy of 12 ft lbs/ max velocity of 191.2m/s and energy of 16.27J
 .20 Match Pellet of 5.00mm in diameter and 13.73 grain/0.89g in weight must be used for HV class= max velocity of 809.84 fps and energy of 20 ft lbs/max velocity of 246.84m/s and energy of 27.12J
 
 .22 Match Pellet of 5.52mm in diameter and 15.89 grain/1.03 in weight must be used for LV class= max velocity of 583.11 fps and energy of 12 ft lbs/max velocity of 177.73 m/s and energy of 16.27J
 .22 Match Pellet of 5.52mm in diameter and 18.13 grain/1.175 gram in weight must be used for HV class= max velocity of 704.75fps and energy of 20 ft lbs/max velocity of 214.8 m/s and energy of 27.12J
 
If shooter does not want to test with standard test pellets, they can provide their own pellets. These pellets must be weighed
(average weight for 10 pellets) and calculated for maximum energy.
However, for testing purposes only the pellets should not be lighter than
 8.44grain/ 0.547 gram for LV class and 10.34 grain/0.67 gram for HV class for caliber 0.177;
 13.73 grain/0.89 gram for caliber 0.20 (for all classes);
 15.89 grain/1.03 gram for LV class and 18.13grain/1.175 gram for HV class for caliber 0.22mm
 
 

Dick


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Oledawg
(@oledawg)
Joined: 1 year ago
Posts: 2
2018-09-06 13:00:51  

Thanks Much appreciated. 


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