Problem: LHO was taught as a marine to use a “loop sling” connected to his non-firing shoulder to fire with maximum stability/accuracy. The M-C rifle “found” at the TSBD has a CARRY sling not configured for loop-sling firing, making it unlikely LHO fired it using the best skills he had. In fact, the M1 Garand 7.62mm x 82mm rifle he was trained on with open, iron-sights is GAS-OPERATED, meaning some recoil is absorbed by the action; he had NO FORMAL TRAINING with a bolt-action rifle with optical scope which takes the full brunt of recoil meaning a longer delay in reacquiring sight alignment/sight picture after a shot = he didn’t have the time or skills to do all the Dealey Plaza shooting
LHO as a marine firing M1 Garand right-handed with loop-sling (highlighted in green) from high kneeling position
TSBD M-C rifle: Wrong type sling in carry configuration