quote:

Originally posted by tacfoley:

quote:

Originally posted by 92fstech:
And with irons (albeit REALLY nice ones!). Great shooting sarge!

They are not 'irons'. 'Irons' are what you get on a basic Ruger 10/22, or cheap air rifle, like a Daisy.

These sights are called dioptre sights, as used in 10m air rifle, 25/50m .22cal and all non-optical competitive centre-fire shooting.

I'm clear that they're diopters. No glass, so they're irons so far as I'm concerned, but I'm not going to argue the point. Damn fine shooting no matter how you look at it!

As a generic, nonspecific term, in the U.S., “iron sights” is commonly used to refer to any nonoptical sighting system. And has been for at least the 60+ years I’ve been paying attention to the subject.

quote:

Originally posted by sgalczyn:
Any info specifically on the round Sherry used?

I can't find articles which list the round, however 6BR has the right stuff for this distance and type of shooting. The cartridge is inherently accurate, exhibits low recoil, and has flight ballistics good enough for at least 600 yards in forms of competition. I shot a 6BR rifle that was set up for PRS-type competition -- it was amazingly easy to hit targets.

6BR is almost the definition of "short, fat cartridge". A 6BR round next to a 6.5CM or 308 is "cute" -- almost like, this is the only round Mommy lets me shoot. To get an idea of recoil differences among cartridges, case capacities are:
6BR - 38 grains
6 ARC - 34 grains
6 Dasher - 41 grains -- a cartridge based on 6BR
6x47 Lapua - 44 grains
308 Win - 56 grains

6x47 is likely the strongest round currently used in 300 meter rifle. But the 6BR has less recoil, better accuracy, and only slightly more wind drift.

The is some fantastic shooting by Sgt Sherry!

Our very own jelrod built me a 6.5X47 Lapua that is silly accurate. Off a bench, I just poked a 50-3X at 500 yards at Raton a few days ago. The extreme spread of the group was 3.6". Real good for me squeezing the trigger........

The mirage was really bad, but the wind was still pretty low or it would have been much worse.

Another great shooter from the Marksmanship Unit was Ernie VandeZande. He was a good friend. When we fired on the Murray State Rifle Team together I think I only beat him three times in four years of shooting.

Ernie is gone now but not forgotten.

Love u man

quote:

I'm clear that they're diopters. No glass, so they're irons so far as I'm concerned,

Right. I am annoyed by people who call an aperture an "open sight."

In olden times, the US 300 meter load was a .30-06 173 gr boattail about 2300 fps to keep the recoil down. HiVel #2 was not much sensitive to airspace in the case and shot well in a light load.

quote:

Originally posted by Jim Watson:
In olden times, the US 300 meter load was a .30-06 173 gr boattail ....

I once read that the .308 168 grain Sierra MatchKing bullet was originally developed for use in the 300 meter course, and not intended for longer range shooting. Do you know anything about that statement?

quote:

Originally posted by 92fstech:

I'm clear that they're diopters. No glass, so they're irons so far as I'm concerned, but I'm not going to argue the point.

I will!

Start on page 337:

https://www.issf-sports.org/ge...file=Rifle_Rules.pdf

"7.4.1.6 Sights
a) The front or rear sights may have light or tinted lenses or a polarizing filter,
but the sights may not have any system of lenses. The intent of this rule is
to prohibit the use of any “system of lenses” that would act as a telescope.

to magnify the sight picture seen by the athlete. The only exception to this
is that an athlete who requires optical correction to see a clear sight picture
is permitted to attach a single lens to the exterior of the rear sight but not
to the interior. Additionally, the wearing of contact lenses or a natural lens
replacement is allowed because these are essential for an athlete to see
normally when not shooting and are not external attachments that are
deliberately intended to magnify a sight picture;
b) No Light enhancing system, optical sight, optical system or telescope may
be attached to the rifle;
c) A single corrective lens may be attached to the rear sight only; or the athlete
may wear a corrective or tinted lens;