126 THE ANGLER AND HUNTSMAN 



this treatment does not remove the leading, the barrel 

 should be returned to our factory where we can remove 

 it, unless the interior of the barrel is too badly pitted or 

 rusted, in which case a new barrel will be required. 



High Power Rifle Barrels: 



" Procedure for high power rifle barrels using metal 

 jacketed bullets is the same as for .22 caliber rifle barrels 

 except that a second cleaning one day later is necessary. 



" Sometimes parts of the metal jacket of the bullet will 

 adhere to the lands or grooves of the high power rifle bar- 

 rel. This condition is known as metal fouling and if pres- 

 ent only in small quantities can easily be removed by a vig- 

 orous rubbing with a cloth patch moistened with a concen- 

 trated solution of Ammonium Hydrate. 



"If metal fouling is present the patch will come out 

 a deep blue color. Patches with ammonia on them 

 should be run through until one comes out practically col- 

 orless. The ammonium hydrate treatment will remove 

 light deposits of metal, but when the fouling is very heavy 

 as is sometimes the case when the barrel has been shot 

 a number of times in rapid succession, we have found the 

 following preparation the best to remove it: 



Ammonium Carbonate 200 grains 



Ammonium Hydrate 6 ounces 



Ammonium Persulphate 1 ounce 



Distilled water 4 ounces 



"The method of applying is to cork up the breech of 

 the rifle and fit a short section of tubing over the muzzle. 

 The solution is then poured in until it fills the barrel and 

 part of the rubber tube so that the muzzle will be com- 

 pletely covered. The liquid should remain for thirty 

 minutes or an hour, then pour out. This preparation de- 

 teriorates with age and is most effective when fresh. 



"Care must be taken, if either of the above methods 



