You are correct in your observation that 1,200 fps is the accepted delineation between high velocity and standard velocity ammo. I'm sure that you know that the published velocities are achieved from a long barreled ( typically 20 inch) fixed breech test gun. The measured velocities out of a 6" blowback action would be reduced by about 15%. A Standard Velocity 40 gr bullet with a published muzzle velocity of 1,050 fps would typically achieve a muzzle velocity of approximately 890 fps from a pistol which equates to about 70 ft-lbs of muzzle energy. A High Velocity 40 gr bullet with a published muzzle velocity of 1,200 fps would typically achieve a muzzle velocity of approximately 950 fps from a pistol.(Standard Velocity) which equates to approximately 80 ft-lbs of muzzle energy.
If you give any credence to Mr. Newton's laws of motion and energy then you know that the energy at both ends of the barrel (muzzle and breech) is equal. The energy at the muzzle propels the bullet forward while the energy at the breech propels the bolt (slide) rearward. The more muzzle energy the more bolt thrust. The calculations show that High Velocity ammo generates approximately 15% more muzzle energy (ergo bolt thrust) than Standard Velocity. That bolt thrust must be absorbed by the recoil spring and ultimately by the frame when the slide smacks into the slide stop. The Big Button guns have a frame that is weak on the right side because of the milled slot for the magazine button which terminates into the milled out area for the slide lock lever. Ergo, high bolt thrust coupled with weak recoil spring equals potential for a cracked frame in Big Button High Standards.
Keep in mind that the High Standard Big Button design is a half a century old. Because of modern metallurgy and design techniques most present day semi-autos are made to accommodate High Velocity ammo. The premier, tough as a tank, gun is any of the Ruger MKI, II's III's or 22/45's. You can shoot most any .22 ammo through them without harm. However, Ruger warns against shooting any Hyper Velocity ammo (like Stingers) to avoid damaging their guns.
Don, if you really have a burning desire to shoot high velocity ammo, then buy a Ruger Mark II or III. I fire HV through mine without a second thought of damaging it. However, the risk of cracking a... more
High/Standard Velocity Jim Barta,Wed Apr 25 15:36
Have shot hundreds of rounds through a H-D-M, and others. Where should I inspect for cracked f rame?? Will buy std vel, e.g. CCI green from now on.Is true also for Sentinel revolver? Thanks for all... more
Big button John J. Stimson, Jr.,Thu Apr 26 04:19
Hello Don, The big button guns are the 102, 103, 104, 106, and 107 series guns. The take down push button in these series guns is larger in diameter than the push button on the 100 and 101 series... more
Mr. Stimson I was reviewing earlier posts and ran across your advice for spring replacement on pistols. What would be the best place for aquiring those springs for the Victors, (would the springs for ... more
HEllo Jerry, The only spring you should need to replace is the driving spring in the slide and all models in the 102 and later series use the same spring. Springs can be obtianed from Brownells or... more