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A Standard Reference Book for Shooters, Gunsmiths, Ballisticians, Historians, Hunters and Collectors By JULIAN S. HATCHER Major General, U. S. Army, Retired HATCHER'S NOTEBOOK

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AStandard Reference Bookfor Shooters, Gunsmiths,Ballisticians, Historians,Hunters andCollectorsBy JULIAN S. HATCHERMajorGeneral, U. S. Army, RetiredHATCHER'SNOTEBOOK)\1.1\' :-'.II\Il.IlI:.KI Tix A,m:r;&3/1 Rifln1un, :'Ileml..", I he 1" "Ilhe new ,22 ullibre Springfield."Aboul Ihe lime Ihal Europe inlo war, a y",mg or the UnilerJSlate, Army was hecominj:; known'" an authority on rapirJ firero. A. the warl'wgrened, he turneu his atlention 10 military .man arms, anu having bet'llinlereSled in rifle and piuol .homing all his life, he..,,"e ev,n a moreprominenl human ,,"crur in Ih.. devdopmenl of our arm)' rifle. lhan he hatl bw11inwork...-ilh machine guns,"For Ihe three yeaHpa.sr, whirh have SC9H1911) 1,55,09: 19H 1441H1 :19:U 1,16:,511935 1491,531IY: 1 1,:II,JOOIII IY36, during the tooling up for theCarand, productionIIi theSpringfield butit wasresumedinaslll,tll wayin 11)3].Ihefast receiver 1l1ade was inOctoher 1939. and it hadthe numberI,Sp,87S Un Novemher I:. 1941. rhe proouction uf Springlidlls was ,.gainresllmed at Ihe plant of the Remington Arms Co. Ilion, N. Y., andIhe lint riRe produced by themunder this contrnct was 3,000,001.TherearethuefurenoSpringfields withnumbersbetween 1.534>878,rhe last one m:\deat SpringfieldArmoty. and 3,000.O(1I, Ihe fin.1 onemade oncommercial contract during'Vorld'Var H.At first, Remingtoll Il ....Jetheordin:u)' :\, 11)03, withsomeoptionsas to the formof stock and (){hcr det2ikTheystaned lTllI\::in'" re-ceiversandooltswiththes::lllleJ Vz % nickel Steel usedintheSr"ring-fiek.ls, afte:r"'2rdchangingto:\ chrome-nickel-molyhdenumsrcc withunlv .20%to.40%nickel. or onthe avenge.:Jhout onctenth2Smuchas ll11d been fomK'r)v. but withthe s:t.me amount of chromium.,th;'!t is, .:0%to.40%. plus 1Io SIII:\I1 percent,lgeof molyhdenum.Tn the dIan to gain increased production, this finn immediatelybeganstudiesandexperiments on design changes tol11:Jkemanufacturesimpler :l.ndeasier. Onechange wastoomit twoof the four groovesusedinriRingthebarrel. Asit wasfound thai there waslinlcdiffer-ence in the performance of lhe two grooved barrel and the fourgrooved one, thisapprovcd. There were a nlllllbcr of IIlherchanges, andonewhichwasadistinct illlprm'Cl1lellt W'bthe provisionofarecciver rcepsight.H....TCHER'S NOTEIlOOl{Onl\lay21, 194z, thissimplifiedformofSpringfieldwas approvedfor manufacturil:;lltandRedfieldJuniorwas madeby the Remington Co.,withserialin N,ebllochgivenhelow:3,47.088 to 3,4Z7,01l7" 4,9\l2.oo1 to +997,045i'-4,lXlO.OOOtoZ-l,fX}!,920Spri1lgfield IH."le by L. C. Smitb-CQrOll;1 'l'ypt"f' closure principleused in an earlv experimental Garand semiautomatic rifle.totherear thecamsurfaceliftsthislockingblockourofcngagementwith the reilj", uf lhe Marlill Rockwell Co. The l1un " ' a ~ u,eda' a fixed a,rnafl ma,-hinc ~ u n synchroni.oo 10 fire Ihrou/(h Ihe pro-peller,,"'erful deariemotor. S,,-dball bearin.'!swerefedintulheof rOlOf through,he nuible pipe. and ,,'ere deli"ered at a speed of abont 1200 thMugh ,he slot at lefr. The Meuraalion \",hen it was submitted to the Board. I was present, till havethis hl111et andthe. remainsofthiscartridgecase amongIllyrather large collectionof cartridgecurios.At thetest oftheBerthier machinerifleat SpringfieldArmory in1917, a jamoccurred, and when rhe handle of the gun was drawnback the hot cartridge was ejected but exploded in the air JUSt infront of the groupof men who were holding the gun. The bulletin the cuff of one of the spectators.Another time at Springfield Armory a cartridge exploded whileIwasextra(;tingit fromahot Browningautomaticrifle, but ately it was all the way out of the breech; and ,vhen a modernmilitaryriflecartridgeexplodesintheopen airitdoesnothavemuchforce, sonodamagewasdone. USltallytheexplosionis JUSt sufficientto tear open rhe cartridge casc andsend the bullet with very lowvelucity. Of course there isof gettingpieces of brass blownintohandsor eyes.The greate,t danger ina case like this i, in havingan explosionwhenthebreechis jammedinapositionverynearlydosed. Inthiscasethepressureishigh:mdtheexplosionis "jolent, andsomepartsof thebreechmechanismarclikely to be blownout withsufficientforce to do great damage. )n this way, an extractor blewout ofa"1:l.rlin gunandstruckasoldier in the:l.bdomeninflictingawoundfromwhich heafterwarddied,Submachine Guns or Machine PistolsDuring World ,",'ar J, the Germans introdu(;ed into actual andrather extensive use atype of machine gun which up tothat limehad been very little known. but which was very widely used inWorldWar n. Thisisthemachinepistol, or submachinegun, firingpistol ammunition, or in some cases, ammunition intermediate inT h ~ fi ... S"hr>u...hi". RU"; .h.. h"lian Viii.... P....os:I.. "nC'J no..... hu WRe'gmann. ;, UWS the9 mmLuger O1"tridg". On al,'CQ canbemade heavy enough to absorb d1e sudden and powerful impact ofthe gas. Moreover. the pressure of the gas on the piston enduresfor only averysmall time interval, andif the piston can be madcrather heavy, it will havea bettcr chance toabsorbenough energyduringthis very brief interval tocarry it through its stroke.With thc shouldcr rifle; conditiOn> ~ r e I"C')' milch lIlorc difficlilT.. ~ n early example 01 the semiautomatic rille submitted for tesl hI' tbe United S t a t e ~ Machine liunCompan}'. Based on a Bc:rthier design.I,d1Th., Bang wmiamOm2fic rille, IDOlkI of 1911. This gun ;5o?"raled by me pull of l h ~ muzzle bl:ul O.rreJ. II mll5l be removed befon. fitin];_The impru,-n! .2'S6 Banfl rifl# .uhminrd b) .\Ir. Bang ID me Ordnanl"f' l ~ p : l T l m m l In 19?7. h did DOl diffN ltre:lll!origin21 lbng. The anion is shown dOled.from m.'47The piston and other moving parts C:lllllot be made heavy or thegunwill weightoomuch; andlight parts donot haveenoughinertiato carrythrough the rearward motionafter the gas pressure is gone the impact of the gas is made extremely violent. The resulthas been that in most gas-operated shoulder fiAcs thepistongets upenergy enough toopen the breech against theSprIngactionbybeingslammedtothe fcar withvcry highspccu, and this violentaction is conducive [0 vcry high breabgcs.The BrwglVjl"In 1911, Sorcll Hansell Hang, of theDanishRecoil RifleSyndicate,CAlpenhagen, submittedarifle whichpassedaremarkablysatisfactorytest. Its performancewasbenetthanthat ofanyothersemi-automaticrifle whlllittcd up to that tUlle or ior Illan)' years to COllie. It isdescribl:donpage62.The Bang gun ,vas big and bulky, but very light. The lighmesswasohtainedbyhollowingout the';tocksothat insomespotsit waslittlemorethanashell, andbyturningdowntheharrelsothat it wasreducedtothe minimumindiameter.While thisgunpassedasplendidt'Cst asfar as thefunctioning wasconcerned, the harrel far roo lighr Tn stand the heat.The muzzle cap used by Bang was mnch like one patented 'JySir Hiralll IVhxill) in 1885. Such a principle was experuncnred withby Juhn Bw\\/ning in i889 on a modd gun hllilt by him. It ,vasused, but not patented by Bang, probably on account of Maxim'spatent. It was used in an auto-loading ritle built by Mr. Garrisonofthe RemingtonArms Co., about the time ofWorld\Var 1, usingthe breech action of the Remington auto-loading rifle. Grant Ham-mond also patCllted some modifications of this principle. The riflesubmitted for test at Springfield in 1921 by General Liu of Chinahad the muzzle attachment in almost the identical form inwhich Rang ;-;sedit. ThePnte:lllxl\hchille !Yun, used bv the French, .for some years used asimilar type of g"lS lake-ofT. TheRheinmemll&llIi-autolll,ltic: rille, designed by lelTl and tested atAbcHken Proving Ground in ll)2l) in the .276caliber hadamuzzlecapalmost exactly likethe one used byS. I-I. Bang.Hl1tCfJi:TSelFLOiJdillgRifieIn 1920, Major James L. llatcher, (nowColonel; brother of thewrirer) built asCllliauromarjcrifleat SpringfieldArmory, which had sallietype I)f munle cap gas take-off that Bang used,hut which was abig improVl:memon the Bangas far as ruggednesswas concerned, and eliminated the defects formerlv noted in theoriginal Bang. Hecompletedhis first model rifleindie phenomenallyshort time of four months, :Illd \vhilc this rifle passed an excellentpreliminary test, breakages eventually developed, indicating the needT,,o modeh of tiu JCnliaUlomalie'h.,':nwifj >mi . Ii. "t _ Nil!1tl\i .:The Hcincnmnn rifle, anolher modification of the famous and popular Bang, de,iHoed b," Karl Heinemann and submitted b.,Rheinische Mcnallwann uod Maschinen Fabrik. The muwe a{lammeDt andoperalion arc 'the same as in rh" Bang, but Ih" breedldosure i. a I.;nSf oil ntufillcd felt pads buill ;nw,he ,id.., of d,,, m"""zine.f' IL ;,,St. "tienne semiautomatic rifle. Thi, simple gas operated armwas used bl' the frro this doublehut trnllMnl. buhchids. sq. in.proof shotO.K.O.K.H..\TCIll,;R'S NOTlmnoKF. toAfter ,80000 n".sy,. in.proof shot19..91.951Bolt jammcdBolt jammedBolt jammed'-94''.,'"inFig. 1 aret:l.peredor bottle-necked !ifl they coulJn't go \'cry far in even if theydidn't have arim. These alwaysh:l.ve nclearance at diesho\llder, asshownin the:.0 that the rimwill be sure to bear on its seat before theshoulder cancome intoCOl1t:lct. ':Vhensuchacartridge is fired, thebrass e;houlder eventually; but most of the t:nergr in these pHts ismitred more or less gradually through the actiun ofoperatingrod spring.So.\lEU.'l: Ih.l:Ull.,',.",Uppt'r: TbompsolI'S expt'rilN!flllll rcoXl rnIuc(r. Lo....er: anmodd in prwiple lu ,I.., 'H'" usn! nn , .... I.ew;,nll>iunof recoil, rhe Hritish Text-bookof Small Arms, It)Ol) edition, states."The physiological sensation produced by the recoil is generallytermed tlle 'kick.' It is probable that the kick is intensified by rherapidity ofthefirst rise invelocity, whichwiththeLee-Metfordrifleis atrained in about .0006 seconds. The shorrer the time in whichthis maximum is reached, and the greater the velocity, the moreviolem the kick; from this it fullows that the kick, though nodoubt depending chiefly on theenergy of n:coil, cannut be said tobestrictly proportion:ll to lhebtter alone in various arms and withdifferent powders ...'79,80 HATCIIEa's ;'\'O'1'ElIOOI>"The kick is reduced by pressing the rifle firmly against theshoulder, andbyletringthe latter come back freely when the riflerecoils, for then part of the weight of the firer's body i