That is actually some pretty interesting numbers. You averaged 5.75, 6.25 and 5.25 respectively on these really long par 4's. For a 32 cap, you are playing these well. I think of long par 4's as the toughest holes on the course. A bogey golfer can make double on a 430 yard par 4 and never really hit a particularly bad shot.
I would think that if you are around double bogey average on holes of this length, that you would score better on the shorter par 4's, the 3's and the 5's. Are these holes maybe way more open and the others have a lot more trouble?
The course where I played my last two rounds has a rating/slope of 69.0/116 and is 6066 total yards.
The course where I put up my best round in 2013 has a rating/slope of 69.0/113 and is 6216 yards.
On my best round of 2013, where I shot a 96, I felt I was hitting the ball well and not making monumental mistakes. It was the first time I shot under 100. I had 5 pars, 6 bogeys, 4 double bogeys, and 3 blowup holes where I shot a 9 on a 280 yard par 4, 8 on a 460 yard par 5, and 7 on a 430 par 4.
On average on Par 3's I shoot 4.69, Par 4's I shoot 6.63, and Par 5's I shoot 6.84.
I feel Par 3's are one of my biggest of many weaknesses because I don't feel like I ever really hit the ball well with my 5 or 6 iron and sometimes that's extended to my 7 iron. My GIR on Par 3's averages to 10.58%, whereas for Par 4's it's 4.96% and for Par 5's it's 9.9%.
Just typing this out and looking at it, Par 4's seem to be the toughest for me which obviously is not good since most of the holes on a course are Par 4's.
Yeah, perception can be funny. You perceive 3's as your biggest weakness, but you get more GIR's than 4's and 5's and average 1.69 over par compared to 2.63 and 1.84 for the 4's and 5's. You are better at par 3's than anything. And 4's are your worst. Mine too. And I'd imagine other hackers as well. I have a theory about why this is.
Anyway, I'm still confused about these long par 4's you wrote about above. You average 2.63 over par on par 4's in general. Yet on par 4's over 400 yards, you seem to average closer to 1.75 over par (although it is a much smaller data set it could be an anomaly). Also, and maybe more perplexing, you report these courses are in the 6k yard range - but they have 4 par 4's that are over 400 yards? One close to 450? I'd guess that most 6k yd courses have 0 or 1 of these. This sounds more like a 6800 yarder to me. Can you post a scorecard or name the course?