Sinclair Magnums, WSM, Ultra Mags Priming Tool Head Cartridge_257 Roberts Improved 40° Cotton rolls

Cotton rolls

300 Lapua Magnum and

This only means the round DOES NOT meet SAAMI Min Chamber dimensions and is telling you to take another look before deciding that your round is good to fire

Shooters around the world will appreciate the accuracy and extreme long range performance of the Sierra 30 Calibre 240 grain HPBT (#2250)

The tool uses the same RCBS shell holders (post-1980) as RCBS presses

Sinclair Magnums, WSM, Ultra Mags Priming Tool Head Cartridge_257 Roberts Improved 40° Cotton rollsCartridge specific Priming Tool Head to fit the Sinclair Hand Priming Tool. Suitable for cartridges with the same case head dimensions. Suitability: Standard Belted Magnums WSM Family