at 30 yards were less than the cylinder, whik the con 

 trary is generally the case with chilled shot. 



No. 2 GUN 



Velocity over ^triking 



lo yards ^'''^Cily 



at 30 yds 



Cylinder No, 7 1 199 ... 749 

 Choke No. 7 1207 ... 758 



1 6 



Velocity over Striking 



.0 var,is X'='°<="y 



at 30 yds 



Cylinder No. 3 I189 ... 859 



Choke No. 3 1223 ... 847 



No. 3 GUN. ItV^^;. Chilled ^hot. 



Velocity over •■r , •.* 



-' , Velocity 



10 yards . z 



•' at 30 yds 



Cylinder No. 7 I170 ... 756 



Choke No. 7 1205 ... 723 



_Striking ^^,_., Striking 



Velocity over ^'V .^ 

 10 yards Velocity 



at 30 yds 

 Cylinder No. 3 1197 ... 839 

 Choke No. 3 1212 ... 831 



These results tend to show that although no hard and 

 fa^ rule can be laid down, the velocity over 1 yards is 

 in general higher with No. 3 than with No. 7 shot, which 

 agrees with Mr. Griffiths' results of twenty years ago. 

 They also show that whilil th'e velocity with the choke 

 barrel is generally higher at the short range, it is some- 

 times lower at 30 yards than wath the cylinder. This 

 latter result is clearly due to the deformation of shot by 

 the choke. With a view to examining into this, a number 

 of charges were fired from a di^ance of 20 yards into 

 water, the pellets being colledled and examined. It was 

 found that a very large proportion of the shot had been 

 dented by the pressure of adjacent pellets, so that they 

 were covered with facets, whilst those v/hich had been 

 in contadt with the barrel were more nearly hemi-spherical 

 than spherical. This deformation was still present with 

 chilled shot, though less marked. Experiment shows that 

 the deformation is much more marked with 1 g oz. than 

 with 1 oz. charges, and the proportion of badly deformed 

 shot is much greater in the choke than in the cylinder barrel. 



SS 



