I shoot all of mine in our club shoots at Bisley for a club competition.
1918 SSA SMLE No. 1 Mk III
1943 BSA No. 4 Mk I
Plus a 1901 Sparkbrook long Lee Mk I* and a 1917 Winchester P14
The long Lee is my latest acquisition and is good out to 900 yards so far (not tried anything further.... Yet!)
I regularly shoot my No4 Mk2 in CMP vintage rifle matches here in Florida. Usually the only one on the line. It's nice to be the odd man out in a line full of M1 Garand's and Springfield 1903's.
At our fullbore club located close to south coast of West Australia, we shoot "service rifle" last sun of each month, and few times year the SSAA come to our range for service as well, I seem to alternate between my Matby No4 or my P14, or occasionally one of my other No4's. I also occasionally use my Fullton regulated Matby No4 (PH sight and modified PH front tunnel) in the weekly Fullbore comp, but generally only up to 700 yards and if I've already got a good result up at the particular range being shoot that wkend (so my annual club championship position in Fullbore won't be affected) also recently been trying my faux L42 project at few ranges in sniper matches, but still only playing with that as currently using armalon mount and modified rings while I wait to get hold of one of Mr Pains brackets.
I used my No 1 Mk III* a couple of times for IPSC rifle matches. I am now using my No 4 Mk II. I'm the only one doing it now but I believe interest will grow. The only real challenge is finding chargers that work well for fast loading.
Same compete and shoot 2 x No.4's for general shooters, 1 x MkIII 1945 back up, 1944 BSA Sniper T for very occasional Sniper matches.
Thing with chargers you gotta buy them and sort them accordingly I keep the tight ones separated from the ones used in comp there is probably some work you can do to modify them so they feed faster but as there are scads of them about is it worth the effort years ago I just brought a big lot and went through them think I have about 150 charger clips plus 50 WWI's for they ANZAC shoot when the '16 Lithgow gets dragged out the safe.
Thing is all you really need is 20 that will feed well as you can re-charge them as you go in a detail and not many courses of fire have 100 round applications before the details are swapped.
I did up 10 dummy rounds with two good chargers and practice loading get used to closing the bolt sharply on the second one to knock it out of the bridge the first one you have to dig out with fingers just keep practicing..........
I shoot my No4 Mk1/2 in the standard military rifle class; I use the No1MkIII* in the modified class and a No8 for the .22 trainer class.
We see quite a few Enfields in France, although some have had a calibre change which is not great!