( 258 ) 
I have used Cordite and Rifleite in a *450 black powder rifle, and found them 
pleasant to fire and to give greater accuracy than black, but, the rifling of black 
power rifles is not suited to nitros, and in every instance, I have seen the barrels 
have become pitted and spoilt, though the greatest care was taken in cleaning. 
I believe that black powder is the best for black-powder rifles. The grooves 
are deeper than in cordite rifles. 
THINGS WORTH REMEMBERING. 
Avoirdupois Weight. —16 drachms make 1 oz.; 16 oz. make 1 lb. 
Troy Weight. —24 grains make 1 dwt. ; 20 dwt. make 1 oz.; 12 oz. make 1 lb. 
Apothecaries' Weight. —20 grains make 1 scruple ; 3 scruples make 1 drachm ; 
8 drachms make 1 oz. ; 12 oz. make 1 lb. 
The Grain Weight is the same in all tables. Powder is bought by Avoir¬ 
dupois weight, but in weighing it for rifles, the Apothecaries’ scale weight is 
used. Though only in respect of grains , not in drachms. As an Apothecary 
drachm is 60 grains ! But the correct drachm weight for weighing powder 
charges is 2 7 if grains. 
There are 7,000 grains in 1 lb. Avoirdupois. 
