Baron, as far as whether or not the thing will fire, if you plug the touch hole with a round tooth pick, the powder charge is as well sealed as if it were still in the can. However, as Coyote Joe said, with a shot load, it's so easy to pull the load, you may as well. As far as roundball missing an easy shot at a deer, there's a million excuses for missing game, that's as good as any I guess. The real question IMO, is, as has been mentioned, safely storing the gun in the mean time. I've left guns "loaded" for a year. However, my guns are stored in a locked fireproof safe and i put masking tape over the muzzle to indicate that there is a load in it. Paul mentioned a double load and reminded me of a story. A few years back my neighbor shot a moose with his traditions .54 caplock with 100g pyro and a 475g slug (or there abouts). He imediately reloaded, then went looking for his moose. he found it piled up about 50 yards away. He uncaped his gun then set about dressing the moose. A few hours later he got to the farm and was met by his dad and a few of his crony freinds and they came over to see the moose. he showed them the gun he used on it and heard comments like "you can kill a moose with that thing?". Robert said "sure, wanna see how it works". So (you can see this coming) he proceeds to load his 100g pyro and 475g slug, levels the gun at a dirt bank and just as the sear trips, it occurs to him that it was already loaded. BOOM. the gun roars and sets him back a few steps. Without missing a beat, he turned to the group and says, "anyone want to give it a try??". He had no takers and never did tell them it was double loaded.
Cody