TripleLock,
The box does show a bit of wear, but the ammo looks pristine! Did you get it about a year ago on a GB auction? If so, I was the loser in the bidding war with you!
Do you intend to shoot any & chronograph them, or is this for display/collection only? In any case, enjoy!
I know some of the Remington and Western 200g loads were about 600 fps, but some Super Police loads were advertised at 703 (I think) and 730 fps. I've seen someone refer to a 770 fps load, but haven't ever seen original sources that claim something that high. Who knows, that may have been chrono'ed from a 8 3/8" barrel, whereas the other was from a 6" barrel (just guessing).
I've read, thought, fired & written a fair amount about these 200g loads, and still have unanswered questions:
1) I'm familiar with what people say/speculate about the British rationale for their .38-200 Mk. I service ammo, which rated 600-650 from a .38 S&W case (aka .380 Rimmed). But. . .what did they actually conclude was the basis for its perceived effectiveness? Dwell time? Energy dump theory? Tendency to tumble after entering an unarmored target?
2) Given the specualtion above, was it indeed an improvement to jack up the velocity to 700, 730, 770 or whatever? Or, conversely, did increased velocity stabilize the bullet more effectively, and thereby prevent the tumbling that (may have) caused the effectiveness of the round in the first place?
3) I've handloaded blunt round-nosed bullets, long-ogive flat points, and SWC bullets at various points on this velocity spectrum, and seen that anything with a flat tip drills straight through water, whereas round noses curve (or perhaps tumble). Therefore, it seems to me that getting the highest practical velocities from a LSWC bullet ensures the straightest, deepest penetration and wound channel that is more effective than a stable LRN inflicts.
4) BUT. . .if the real effectiveness of this round was/is its tendency to tumble--and tumbling is only likely at low velocity and with a round-nose bullet--then perhaps the flat-nose and higher vels defeat the purpose of the original concept. Even a destabilized & tumbling 200g slug will tend to give thru-and-thru results on an unarmored human target, while inflicting a larger diameter wound channel than a stabilized bullet.
5) Definitely, part of the British thinking was to reduce recoil (re. the .455 Webley) so that the
average soldier could achieve more hits, more quickly, and with less training. That imperative would tend to make the designers want to reduce velocity, and thereby recoil. That leaves open the possibility that a better-trained shooter would be better served by a higher-velocity round--but again, perhaps that eliminates the tumbling tendency & in sum reduces the effectiveness of the shot.
Guess I won't know the answer until I get my hands on 1920's British Army testing results, and/or pay Brassfetcher to test several load permutations and measure the volume of the respective wound channels.