Late long time huntin' bud had a new Leica 1000 the last year he was up to camp for firearms season. Far better than the Bushnell that it replaced. Only got to use it once for me, on a doe I shot across the hollow from camp.
I figured it at a tad over 400 yards, based on known "benchmarks" on that hillside across from camp.
He ranged it at around 435, just as I squeezed the trigger. Got fired up because I couldn't "wait another second". When we fetched if off the hill and threw it up on his tailgate, he noted that my shot was a bit low. Told him it was as dead as it was gonna get, bit low or not.
We checked his Leica against several benchmarks in the area that we had hunted deer and woodchucks in for many years. Those had been established with another amigo's Barr and Stroud optical, years before. Little if any difference in those marks and what he got with the Leica.
I've had a Bushnell 800 compact since he passed away. Works well on distances out to 500 yards if the weather is right. Cloudy days it ain't worth spit on anything farther than about 400 yards, unless it's on a very reflective mark. But it's small enough to keep in a coat pocket in deer season.
Haven't done much medium long range shooting in the past several years, figure to give that a whirl again this coming season. Had a very nice buck at close to 600 yards last season, late on the second day and walking across a hay field.
If I go into that area this year, it'll be with my heavy barrel 25-06, not the sporter M700 I had last year. Might be time for a better range finder, too.