Well,im not up on standard pressures and all that because i dont reload but if you compare their loads data to any of the normal manufacturers like Pmc,usa,remington,federal etc you'll notice that Double tap rates most of their loads at about 1200 ft/lbs.Now thats a fair deal hotter than a winchester silvertip rated at 800 ft/lbs.The same goes for most of the others,i think federal has one load close to 1200 ft/lbs and buffalo bore or garrett has one at about 1300.But most of the over the counter stuff is less that 1000 ft/lbs at the muzzle.So i just assumed that Double Tap was loaded near the top of a 44 mags rating for that particular bullet weight.
Educate me fellas
Shooter