Encore50
This topic comes up ever so often, and it really becomes a personal preference thing. I think experiance is the best teacher here... The more you know about your ML the more valid your decisions will be, not in just whether to leave loaded but a ton of ather things you will need to make decisions about.
The best thing might be to drop the charge each day, heck there a couple of guys that really go to what I think might be the extreme and drop charges after a few hours and reload. Again experiance will be your guide the more you shoot... I personally often leave the charge in for long periods of time - if I am confident the charge did not get contaminated. The biggest thing I try to avoid isDRASTIC and RAPID changes in temperature, especially going from warm to really cold. Slow changes are not as important as things will balance out.
I wrote this several weeks back and I feel this is a good measure for me...
As i look at mine in here, I am thinking it has been loaded for about 3 weeks now... I only have two concerns when it comes to leaving the loaded (de-capped mind you) - SAFETY & CONTAMINATION... The most important thing is SAFETY is it safe -will somebody forget or pick it up - what ever be safe...
2nd - Contamination - there are a lot of ways to contaminate a load. If any of those ways are possible dump the load and start fresh. If I have been hunting in bad weather I will probably dump the load. If it is stored in really humid or damp weather I will dump the load. If I were using a breech plug greese that over a period of time could contaminate the load I would dump the load. If I were loading a conical or a patch with Bore Butter or any moisture I would dump the load. REMEMBER all substitutes are very prone to collecting moisture.