This is one of the most interesting strings thank you all. 4 years ago I won a rusty cape rifle by Reilly , well documented made in 1853 cost me £850 at Holts London auction. probably 20g left barrel and right barrel .623 two grove rifled. I noticed at holts quite a few rifles were around 16g with two groves. At 79 the police refused to renew my certificates so I am happily limited to bsa Scorpio pcp 177& 22 deadly to 80 yards The loss of shotguns don’t bother me, just a collector now, but it’s frustrating not being able to test rifles, France no problem with BP no license required Anyway the cape rifle has a number of flip sights suggesting it could shoot cape buff , impala out to say 150 yards but what I have learnt to date the winged ball was pretty inaccurate , I experimented by milling groves in some old moulds and even designed a jacketed winged bullet great big things , no thanks . I guess two groves lasted a while until it was realised they were pretty usless. Two grooves were used ok in a lot of cordite rifles due to the small bore, suggesting to me the rifle was not at fault , but the projectile was Dead interesting stuff. More pleased Gordon Me with emu in Oz 1999 And me tofay. All a bit of fun