The coin tubes should work VERY well, but would need slitting down the sides about 1/3rd the way for a very tight shooting load, and further down for more open patterns. It requires experimentation. perhaps three slits in the middle section might give good results as well, with the top and bottom remaining solid without cuts.
; These would have to be patterned at 60 yards, not closer, as at 25 yards, the pattern should be one hole with a few shot scattered around it. To shoot this tihtly wiht a cylinder bore would indeed be exciting shooting.
; Your first picture looks very similar to the Ely ctg. for various bore sizes. They had a paper outer covering, with the wire wrapp slightly tighter,(more of it) forming a mesh around the balls. They came in different colours and different shot sizes down to at least #6 shot for shooting various ranges, in cylinder bored guns. We think tight shootng is a 20th century deal - ot so, in the late 1700's, they also had tight shooting guns with these specialty shot charges. Making your own with paper tubes, with various cuts and dimensions might come close to duplicating these results of 200 years ago.
; Oh yes, we do wish they were available today as the green (I think) colour was for shooting waterfowl out to 100 yards and the black(or other colour) was for further yet range or for shooting deer and wolves.
; One visiting Englishman with a double 14 bore, (.69 cal) flinter, killed 3 mallard drakes (sitting on the water) at 90 to 95 yards with one shot. He used the second tightest shooting ctg. for the ducks as well as for the following contest.
: The contest was against a 12 bore double, 48" cylinder bored, as was his gun but with short barrels, that put 4 shot onto a 4" square piece of paper at 75 yards(12 bore). That is very good shooting, inded for anormally loaded 12 bore at that range. The Ely ctg. in the smaller bore, & 2 1/2 drams of powder, put 28 holes in the same piece of paper with 1 1/8 ounce of #6 shot. THAT's a long range pellet count, as far as the shot will still penetrate. WE're talking head shots out to 80 or 90 yards.
; Yes- I would like the opportunity to try some of those, today.