This seems like a great arrow on paper. https://eastonarchery.com/target/fmj-match/
Price: A lot lower than the 'ulta-skinny' choices (Lancaster prices used for reference)
Points used are Carbon One points, which are good quality and cheap when compared to Tungsten or Tool-Steel points (which are really expensive).
Specs: 4mm diameter (Easton don't list specific O.D's on shaft spines, so not sure on exact spec), 400 and 375 spine with around 10 G.P.I look ideal for 720 rounds. +/- 0.001 straightness is a headline spec, weight tolerance of 2 grains is also good. Comparable to the 'top-line' choices!
Durability: This is the touted advantage of the FMJ. On the old FMJ's I saw arrows which had dented aluminium jackets and some where the front of the aluminum jacket had worn off from the shaft through constant shooting into straw. Aluminium arrows are not fun to pull out from targets in the rain (but then again, neither are carbons)
Hoping to get a set soon to test for 720 rounds!