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There's a nice article by Dan Lilja on his website at http://www.riflebarrels.com/articles/custom_actions/378_weatherby_remington_700_action.htm . Bottom line is that a Remington 700 action is marginal for .416 Rigby type cases. The .338 Lapua is derived from a strengthened .416 Rigby case...

Ian, Aguila ammunition (Mexico) is now producing 5mm Remington Magnum ammunition. See http://en.wikipedia.org/wiki/5_mm_Remington_Rimfire_Magnum . Asa

Larry, A quick search on the Internet leads me to believe Kart .22 conversions are no longer made. (See http://www.calguns.net/calgunforum/showthread.php?t=81978 .) However, there is an article about.22 conversion units available at http://www.americanhandgunner.com/web-extra-22-lr-conversion/...

In the picture above, five rangefinder units are visible. On the top of the forward superstructure is a main battery director, composed of an optical rangefinder topped with a rangefinding radar. A similar director sits atop the aft superstructure. Additionally, three boxes topped by radars...

From the companion page for the German 15" gun http://www.navweaps.com/Weapons/WNGER_15-52_skc34.htm : NOTE: The Germans made extensive use of the sliding breech block in heavy artillery - from the companion page, there is the following: Hope this helps. Asa

16" naval rifle - repurposed by the US Army. One was shipped to Aberdeen Proving Grounds for ballistic testing, and is now in the museum there. http://www.navweaps.com/Weapons/WNUS_16-50_mk2_pics.htm http://en.wikipedia.org/wiki/16_inch_Coast_Gun_M1919 Some photos of a WW2 German 15" naval...

Is the magazine cutoff on the rifle enabled or disabled? When enabled, the rifle does not feed from the mag. This was the preferred way to operate the rifle, rounds in the mag were there for emergency use. See http://www.theboxotruth.com/docs/edu129.htm at the bottom of the page to see the...

David, The 120mm cannon on an M1A1 tank has no brake. Thank goodness, as the "BOOM" from the weapon is loud enough as it is. Reference: http://www.inetres.com/gp/military/cv/weapon/M256.html You may be thinking of muzzle brakes on the M242 cannon (25mm automatic cannon), used by the Army...

Stick with the 52s and 53s. 55 grain FMJBTs may be unstable in flight in colder weather. As in may not fly point first. How is this relevant? Here's how. Early AR-15 barrels were rifled with a 1-14" twist, and fired a 55 grain FMJBT projectile. Experience from cold weather tests in Alaska...

A little history on the AR-15: The first rifles (Late 1950s/early 1960s) were equipped with 14 twist barrels. This was changed to a 12 twist when tests found 55 grain FMJBTs were keyholing on thrgets in cold weather (Alaskan winter). Faster twists appeared in the mid- to late- 1980s when the...

Larry, I'd start with Beeman, as they were the original US importers for the FWB 300. Weblink for their repair information is http://www.beeman.com/repair.htm . After that, try either Pilkington's in Massachusetts ( http://www.pilkguns.com/gsmithing.shtml ), or Brenzovich (...

For small arms, this is true - lodged projectiles are removed using either a wood or brass rod, or hydraulic pressure. For cannon, such a charge exists, and is known as a "clearing charge". These are used because cannon shells may explode if pushed by metal or wood rods. Don't believe this...

Re: Square bullets. The Puckle gun was designed to do just that. http://en.wikipedia.org/wiki/Puckle_gun Re: Hitting anomalies. As the story goes, a flock of seagulls was one scared up by rapid fire during the Highpower phase of the US National Matches. As it was during a rapid fire string...

Military not using it? Hardly. At least six US weapons systems presently use GPS for some or all of their guidance. JDAM: http://en.wikipedia.org/wiki/Joint_Direct_Attack_Munition Small Diameter Bomb: http://en.wikipedia.org/wiki/GBU-39_Small_Diameter_Bomb Small Diameter Bomb II...

Ray, I did go to Ben Avery to shoot. Didn't do well - two misses on the last day @ 1000 yards. Our Line Officer got snowed in on Saturday and Sunday, and we had to draft someone to take his place. The stand-in actually did pretty well - she normally calls the line only at the US National...

Ray, Not correct. There are two sets of rules which may govern F-Class, depending on match format: If the match is held under US Fullbore rules, NRA's Fullbore Prone rulebook applies. If the match is held under highpower rules (more popular format), the NRA Highpower rulebook applies. Both...

White cast iron? http://en.wikipedia.org/wiki/Cast_iron#White_cast_iron This is just a guess.

AFAIK, Federal was the only maker of 900, 900B, 1000, and 1000B. Rumor I heard was their match .22 line was closed when a bean counter from CCI (this was after Federal was bought by Alliant Techsystems) noted they weren't making money from these products. Oh, CCI didn't have an axe to grind -...

Ammo. While not the same as before, Federal 711B is a good performer for outdoor work. Actually, I miss Federal 900B....

Your rifles were not intended for use in BR competition... The two centerfire rifles appear to be set up for highpower rifle shooting (notice the clip slotted receivers), and the .22 may be appropriate for scoped prone only matches in its present condition. For the centerfire rifles, "proof"...