I called and talked to the following shell mfgrs customer service depts,
Winchester said they recieved a request in writing from the ATA in 1981 to increase shell speed on shells to higher speed for long range hdcp shooting a speed of 1275fps was requested, but shooter complaints of harsh recoil caused the reduction to 1250 fps and they the ATA said 3 1/4 dram shells.
Also duee to the Sporting Clays NSCA assoc request for faster shells for Sporting Clay shooting.
Remington said they recieved a letter from the ATA that was addressed to all shell mfgrs to increase the 1 1/8th oz load to 1275 fps and shooter complaints to them caused the speed reduction to 1235 per Chris of Remington
Federal Customer Service said they recieved a form letter from the ATA addressed to all shell mfgrs for a 3 1/4 dram shell speed of 1275 fps in 1981
And that brought about the Federal Hdcp Load. They also recieved a letter from the NSCA for faster shells for use in Sporting Clays to 1300fps
It was the action of the ATA in 1981 that brought about the shell increase and not SAAMI, all 3 said it was not a request from SAAMI.
The action is directly related to was President in 1981 and the BOD in 1981 that brought about the faster shells, and their the ATA request for faster shells for long range handicap shooting.
I remember the first Winchester Silver Bullet shot shells with the markings
++PLUS++ at the SILVER DOLLAR SOUTHERN GRAND was the first time I saw them
I had them Chronographed and they were 1320fps, we chrono'd them at Yankee Hill Gun Club Waverly Ohio, they were ass kickers and we used them for shootoffs for a few years, but speed was reduced due to complaints from shooters, and lower sales.
Rio said they were following the competetiors shell speeds.
But all said we still mfgr the 1200 fps shell.
These are the facts from the Mfgrs.