Started by LLANOJOHN (deceased), January 14, 2005, 03:22:22 PM
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Quote from: 2ndtimerThis brings up the question of just how hot the loading manuals loads are. Most of them don't say what pressure their 6.5x55 loads are, and leaves us wondering if they are held down to "prudent" 6.5x55 pressure levels, hence can be safely exceeded within reason by shooters using modern bolt actions. For instance, one manual lists 46 gr of IMR-4350, standard primer, 129 gr Hornady bullet as a maximum load. What it doesn't say is whether that is a 50,000 cup load or a 44,000 cup load..
Quote from: overbore2ndtimer, Hot off the computer is this data: I entered the program with this data: Hornady 129grsp (sp2620) 6.5 X55 Sweede H-4350 powder; charge 46.0 gr 26" barrel ( optimistic ) ; SUBTRACT ABOUT 26FPS/ SHORTER INCH PROGRAM SAYS: "MV= 2,825'/SEC CHAMBER PSI IS 48,764 , WARM LOADING LOA IS 3.150" FOR LOADING DENSITY OF 91.1%. iT APPEARS WARM BUT SAFE UP TO 75 DEGREES. ALL CAUTIONS APPLY. OVERBORE
Quote from: overboreMay I respectfully refer all to the following link: for all to evaluate for themselves the 10 shot throat errosion with dangerous pressure rises in a 6.5.. Mauser. Overbore
QuoteThen a "spontaneous disassembly" occurred that destroyed the action but left the barrel undamaged.
QuoteSo unless I can set up my own ballistics lab with pressure testing equipment (come on Lotto!),