sentences:  The .244 seldom performs well in barrels less than long, owing to the need for a longer bore to allow pressure and bullet velocity to reach intended levels.Lloyd was unable and unwilling to embark upon commercial cartridge production, and consequently "gave" the cartridge to veteran London rifle and ammunition makers Holland & Holland Ltd., who in 1954 had paid him £250 towards his cartridge development costs.H&H quickly adopted it, the cartridge acquired the prestigious "H&H" appellation, and both H&H and David Lloyd went on to build significant numbers of very high quality bolt-action deer-stalking rifles in .244 H&H Magnum calibre (see Lloyd rifle).