Hey Dog, your exp with 75gr a-max is concerning.  Do you have any method of checking them for concentricity?  I see they are avail at brownells in 600 ct lot now

I roll them on a piece of flat steel…you can actually see the tip sway, its easy to spot the bad from the good.
I previously shot a 600ct box with only a couple projectiles having an apparent problem,…Nothing like the issue I'm experiencing now with the last 2 – 100ct boxes…I've heard of guys having inconsistencies with the 75 amax on other forums but this is the first time I've experienced it myself.

I been shooting Amax's in my 308 & 300 for a couple years now and have never seen this issue in the larger 30cal pills…I guess its just a bad batch but makes you wonder how many you shoot without noticing if the tip is good or not.  I have honestly not checked the tips too closely before…it might be a common thing if you inspect them.

If all goes well with the 80.5 Bergers I'll be switching for sure…I've measured and weighed a bunch of these and they are 1 of the most consistent projectiles I've reviewed so far for my 223 reloading. Very pleased with them so far.  I'm also testing the 77gr Lapua as well…very good bullet as well, both seem to be better than the Amax.

Love your thinking on the trimmer.
I was looking at the Girand but I ended up going with individual Little Crow trimmers for each calibre I shoot.  I was tired of adjusting tools and didn't want to go through that again every time I trimmed different brass.  I think the Girand is a better trimmer overall but its more work to use and I'm all about cutting my reloading time these days. 

Once you upgrade to any trimmer that cuts off the shoulder you will have better neck consistency and it leads to better ES / SD results…I've seen it first hand with my reloading.  If you are doing mostly 223 loading / shooting its not a bad investment for the Little Crow trimmer.  The improvement and time it saves is well worth the investment.