Winchester Model 70 Bolt Release (UW70BR) Brand_Woodleigh they sought to test lengths

they sought to test lengths that made the most sense for the intended purpose of that specific bullet in the intended cartridge

Powder Funnel

They used the combination of COAL (Cartridge Over-All Length) and bullet that produced the highest pressure throughout the testing of that bullet weight group

Sporting Clay pads have basically the same contour lines as an all purpose pad except for the 45 degree cant in the heel canted which allows easier shouldering from the "low gun" position

Demanding test regimen insures lot-after-lot consistency

Winchester Model 70 Bolt Release (UW70BR) Brand_Woodleigh they sought to test lengthsUsed Good Condition Includes Spring & Pin