The 69 and indeed the 75s from PPU work very well loaded to mag length. Same with Sierra 69 and 77gn bullets and indeed the majority of them in that weight that I've tried.
A compressed load shouldn't be a problem, I use between 24 and 25gn of various powders with 69, 75 and 77gn bullets from several manufacturers and it is nearly always compressed. It is not an issue with pressure or extraction and the consistency is great.
With compressed loads it is best to initially work up to the charge you want and check for pressure but generally there isn't a problem with compressing the charge a small amount. With ARs and similar magazine fed rifles it is something to get used to and not worry about (once you've determined it's safe for your firearm of course), many manufacturer's and published reputable reloader's recipes state that the powder will be a compressed charge if loading to mag length.
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