Sherman Tank Myths - The Misery of Having 'Facts' To Work WithBy Copyright 20!" #$%$ &ea'" ('' )ights )eserve*Can anyone +'ame anyone for not +eing a+'e to ,get the facts right-$ . /as researching the 01estion of /hether or not the 2!-mm ro1n*s 1se* in the Sherman tank3s M4 cannon /o1'*cham+er in the 25-mm M series g1n$ . ha* on'y +asic n1m+ers to /ork /ith 6overa'' 'ength" cartri*ge case 'ength" etc$7 co1rtesy of TM8 80 6(rti''ery (mm1nition7 *ate* 28 #1ne 899$ So . starte* /ith pict1re compares$My process /as to take a snap-shot from case +ottom to pro:ecti'e tip from the TM8 80 p*f$ ;sing a sca'e of C ro1n* is 44$E- 'ong an* has a 8$E- 'ong shot$B1t" the M92 HF ro1n* is 44$4- 'ong an* has a 2$9- 'ong shot$ Ho/ co1'* the HF ro1n* have a pro:ecti'e 2$5- inches 'onger than the (>C ro1n* +1t +e a ha'f inch shorterC The 25mm M28 (> ro1n* 6no +a''istic cap7 is 28$E- 'ong /ith a 8$2- shot$Ho/ co1'* the M28 +eshorter an* yet have the same 'ength of shot as the M52CG(s . 'earne* more . rea'iAe* the pro:ecti'es co1'* have +een inserte* *eeper into the case" hence having a shorter overa'' 'ength$ This /o1'* a'so e ro1n*s *espite +eing ,S1per Charge*-$H. 'ooke* at the 4-inch ro1n*s for the M!" M5" an* M2 g1ns 6there /ere t/o types of 4-inch g1ns in 1se in the 890s an* the T8 chosen for gro1n* force 1se in tanks an* g1n motor carriages /as a *erivative of a 8E /eapon7$ My +rain /as +ogg'e* yet again$ Since the 4-inch g1n 1se* the same pro:ecti'es as the 25mm 61se* them ?rst at that7" .3'' 'ist them o1t in M52 (>C" M28 (>" M92 HF or*er= overa'' 'ength 4!$5-" 4!$9-" an* 49- an* pro:ecti'e 'ength 8$E-" E$8- an* 2$9-$ The M28 is 01ote* /ith a *iBerent 'ength pro:ecti'e than the 25mm M28 6B;T THF %FS.I&F)S ;SF% THF S(MF >)D#FCT.JF" %.%&3T THFKL7$ The 49- 'ong M92 HF ro1n* ha* a 2$9- 'ong she'' /hi'e the JD&IF) M52 an* M28 (> ro1n*s ha* a shorter shot$. 1se* my pict1res an* meas1re* *o/n from the tip of the 4-inch an* 25mm M52 pro:ecti'es an* fo1n* that 'ength of 8$E- 68E0 piC ro1n* for the 2!mm /as meas1re* /ith the +a''istic cap since it is 01ote* as +eing 4$2P 'onger than the cappe* M52 pro:ecti'es$ (n* yet they are the same /eight$. *i* not e ro1n*s 1se* might +e referre* to as either since some *i* have asma'' e
