Thank you. I always do use a dependable spotter so that wont be an issue.
Yes, I think I am going to do some higher weight-lower rep sets as I get close. Just to keep the jump from being too big. I wasn't aware that I shouldn't do much during the week before I max though so that is great info. Much appreciated.
You can, certainly. There are plenty, though, who rarely if ever go above 90-95% of their max except in meets and of course set big 1RM PR's when they finally go for it. Jim Wendler mentions several examples (Ed Coan is one famous one) who have done this regularly. Everyone is different, though.
I personally am doing 5-3-1 so of course I am doing a wave progression every 4 weeks going from higher volume in the beginning to lower volume to higher intenstiy at the end of each wave, followed by a de-load week. That is probably not necessary for you yet as you are still in the novice stage.
If it's your main goal to hit 315 as quickly as possible then doing what I said should get you there, but then again I would also advocate what others said ignore the silly contests and simply keep progressing on the program you are on until you can't anymore, then switch to Texas method or something else more designed for intermediate to advanced lifters.
Yep, as mentioned, straight linear progression for as long as it's viable. Then you'll need to plan your training over longer blocks, whether it be the texas method, 12 week linear periodisation blocks, or other. There are many, many ways to skin a cat, and for everything one guy tells you, there will be 5 guys saying something else, find something that works, and that you like.