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The .300 H&H Magnum Cartridge was introduced by the British company Holland & Holland as the Super-Thirty in June, 1925. The case was belted like the .375 H&H Magnum, and is based on the same case, as also is the .244 H&H Magnum. The belt is for headspace as the cases' shoulders have a narrow slope rather than an actual shoulder. More modern magnums continue this practice, but headspacing on the belt is not necessary with their more sharply angled shoulders. The cartridge was used by American shooter Ben Comfort to win the 1000-yard Wimbledon Cup Match at Camp Perry in 1935, and it was used again to win the international 1,000 yard competition in 1937. Winchester chambered the Model 70 in .300 Holland & Holland Magnum in 1937.The cartridge offered superior ballistics to the .30-06 for long range, and the .300 H&H is almost as versatile with all bullet weights and types, especially if well-developed handloads are used. It excels with the heaviest .30-calibre bullets in the 180–220-grain range. SAAMI has set the pressure limit for this cartridge at 54,000 P.S.I. Its case length calls for a full-length magnum action, and surplus military actions chambered for the .308 Norma Magnum or the .300 Winchester Magnum offered a lower cost alternative for similar ballistics in the 1960s. The long .300 H&H case was designed for loading cordite, and those two modern magnum cartridges offered similar powder volume in a shorter case better adapted to ballistic uniformity with United States Improved Military Rifle (IMR) smokeless powder.It has never been as popular as the .30-06; but the mystique of well-crafted rifles chambered for the .300 H&H keeps the cartridge in use despite its repeatedly reported demise. The .300 H&H is a fine African plains game cartridge, and suitable for all but the most dangerous big game and pachyderms.
Remington Custom Shop 300 H&H built for the former manager of the custom shop. This one is from his personal collection. Trued and blueprinted Remington 700 Limited action. Douglas Air Gauged fluted barrel. 1-10 twist. Barrel marked Holland Super 30. Nesika bolt stop. Tactical bolt handle...
I have this old Remington box of 300 H&H brass that are factory primed. There are 18 Remington brand and 1 Winchester Brand cases. Camera makes them look nickle but they are simply brass. I believe these cases were once loaded with 180 Core -Lokt's that were pulled. Nice old box. Price is $25...
300 Holland & Holland. One full box of 20 and and a second partial box of 12. Total of 32 rounds of 180 grain Winchester-Western Super-Speed vintage boxes. All or nothing. $45 by cash or PayPal. You pay the shipping from Newberg.