hotdotRipTideturn off viewmodels, turn off sound, physically block off any hud elements that suggests which rifle you're using on your screen, record your game as you play, rewatch the vod and if that's still the case then i can take you seriously
nobody needs to do any of this, and he's going to know what weapon he's using regardless of hud elements.
I've done this I always play without viewmodels, and I would randomly switch my loadout, and I think it might be the sound of the sniper rifle helping me aim. When I don't have sound on my aim for both weapons is the exact same but when sound is on I aim significantly better with the heatsmakee.