>>618135
Of course, that's the oldest way of doing it. Simply increase case size for both moar powder, also more actual area of pressure to build up into. Its why a 30-06 held to lower pressures by SAAMI in the US has same or even slightly better ballistics than a 308 at higher pressure. See the 45-70 Gubmit's bigger brothers from the blackpowder era, such as the 45-90 and 45-120, even at the same pressure there is greatly increased performance at the same pressure due to more area inside the case because of that larger case size.
The little secret of increasing power in a cartridge is this (don't tell anyone) the advantages of case design efficiency aren't the great or impressive. They do change dynamics, but the idea you can change the cartridge enough to perform miracles, much less major changes, is laughable. In the end its much more simple changes that end up making up performance like sheer case size capacity more than anything else.
>>617776
Short and fatter cases may have some small advantage in slow burning powder, but keep in mind that old fashioned straighter cartridges were superior with fast burning powder and lighter loads, therefore the assertion that "short and fat is better" is not quite true, it simply has a small advantage with certain powders and certain bullets. Old Mauser family cartridges like the 30-06, 8mm, 6.5 Swede, and long magnums like the 375 H&H, as well as straighter blackpowder like 45-70 Gumit, are all well known for their various qualities in full power rounds, but are also exceptionally well performing at lower loads. Reduce the pressure, choose faster burning powders, suddenly the edge goes back from these new super shorts back to classical long. 300 Whisper isn't a super short stubby, now is it, considering they want it for suppression and subsonic? 30-06 is legendary in cast rifle circles, 375 H&H is well known for reduced jack bullet loads for deer. 300 Win Mag, much less more radical short stubbies, are not good at either cast or reduced loads because its design is so optimized for full case, slow powder burn that it cuts itself off from other possibilities. Not an issue if all you use it for is full power, full powder charge loads, but a consideration to be taken in. They aren't the hype you think they are, in the overall, short stubbies aren't magic or some scientific breakthrough like the advertisers try to make you think, and most of all they are different, not universally superior.
Finally, once we come back to magazine capacity the old straight cases win yet again. Short stubs brag endlessly about how they can shorten the action length by a fraction of an inch and cut one tenth of an ounce from the gun's weight like they have done some sort of miracle. But, especially for combat considerations, those fatter bases yield less rounds per loaded magazine for the same size magazine than an old straighter bottleneck. My 375 H&H is big, but in a CZ rifle does it have better capacity than a 300 Win Mag? Can you fit more 243 in the same magazine space then the WSSM? 9mm Luger, 5.7 in the handgun world, and all smaller caliber rifle cases for service consideration brag about weight savings and higher capacity in a smaller magazine. A general service cartridge with a short stubby will see this slip past them, they will require larger magazines for the same capacity. People got so fucking hung up on shortening a case they forgot they ended up making it larger, too. Huh.
Also shoulders must be considered for feeding issues, at some point a bottleneck is better than a straight case for feeding in general. But, keep fucking around with that design and the shoulders will go past peak efficiency and go backwards, making the cases harder to feed and less reliable. The "miracle" of the super stubs comes crashing to a halt here, they are toy cartridges to sell to people with too much money, they offer little to nothing to the military, security, or even auto loading rifle community in general.