I ended up getting a Klarus FH10 for my 22 and will use it on my 243 as well... they are on ebay for $150.
The two big advantages it has over every other torch i could find was that it had an adjustable focus AND a white, red and green led on a slider.
Be careful about lumens values. The Klarus FH10 is only 700 lumens but it has a noticeably better range than a friends 1020 lumens M2X. Lumens is more a measure of how it lights up the room as i understand it.
I have copied my review below. On the 22 I prefer to use the red light as it disturbs animals less and their eyes stand out better. You can adjust the beam width depending on how far you are searching.
EDIT I was also considering the M3X but its brightness drops from 1200 to 720 lumens after 5 minutes.
For a 22 a pretty cheap Chinese torch would also do the job plus you could have a second one for when you are just spot lighting.
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My Klarus FH10 torch turned up yesterday. Initial impressions are that it is very well built, compact and not too heavy (300g with battery). It works great on a 22LR and would be equally at home on a centrefire. There are dual springs on the battery so recoil should be fine on a centrefire.
The red, green and white LEDs are on a slider and the light can be focused in and out as required. At the tightest the beam is about 0.6m wide at 10m while the widest the beam is about 2.7m wide at 10m.
The white LED, as a spot light, lights up the hill 280m away and there would be no problems identifying a roo or deer at this range without a scope. At 280m the beam is about 15-20m wide (square edges) with no spill. Usable hunting range (white LED) is probably about 330-350m max.
The red LED let's you identify targets at around 100m but would show eye reflections a lot further. The green LED lets you identify targets a bit further but eyes don’t light up as well as on the red LED.
There is an on/off button at the back plus a tail switch to toggle between low, medium and high beams. Klarus claim 2.5 hours run time on max with the white LED using the standard 2600mAh battery. The bigger 3400mAh battery I ordered should push that to 3.3 hours.