Just a little ingenuity. We had a guy in the '70s who brought deer guts from his hunt to roll out of his shirt when looking for his wound.Thats going to be a pretty tough one to reenact.
Bloodpacks used to be all the rage. Ya take fishing line from the chin strap of a kepi to a guy standing behind. Blood is under the kepi and stuck to the victims head. The guy behind takes a chest hit and pulls the fishing line causing the front rank guy's head to explode. Effective because the front guy actually takes his wound a fraction of a second later so it gives the appearance of multiple rounds coming in like a shower of rain. And....look ma, no Hans.