Just having an idle moment or two. Reading about the 4.5x26 MKR cartridge and rifle of the late 70's early 80's Sweden.
Pushing a very aerodynamic cold swaged solid copper spitzer of 24.4grains at 3,270fps (just short of 1000m/sec) from a curved tapered .22WMR, the curved taper likely a compromise between volume and ease of extraction. Firing from locked bolt due to the light case and the high pressures involved.
Here is an image, demonstrating 7 rounds MKR was same weight as 2 rounds 5.56NATO. The tracers would look great, like a little row of red-topped garden gnomes:
Attachment 109283
Cartridges for the rejected military rifle were to be shipped in prefilled 50rd magazines -- I guess because they were fiddly and vulnerable to damage.
The plastic Swedish gun - single, 3-rd burst, or full auto. The 3-rd burst at 1800rds/min (30rds/sec0, might have been useful for goats, in a different world.
Attachment 109286
The unbelievable part is the quoted ballistics which are significantly in excess of the .17 WSM (25 grainer at 2,600 ft/s or 790 m/s), although the .17 WSM has the advantages of being designed 30+ years later and of being based on a thickened 7mm nail gun parent case. What am I missing?
