I would think so. It may be cleaned/polished after drawing and machining taking the surface oxidation off (what gives the coppery colour). I anneal but after one cleaning cycle the brass is uniform yellow again.
Ultimately any wind measurement at the firing line is just that - at the firing line. Certainly wind over the first 1/3rd of the range (at middling ranges) is the biggest influence but judging effects down range without the use of wind flags is next to impossible (especially at Esk. T4 with that bowl shape). I have a Kestrel for basic wind measurements but I've found a bit of experience with wind flags at Bisley to be far superior to just Kestrel at the line.
I know, this seems mad but 16cm at 100m is 1.6 mils isn't it ? 100m divided by 1000 is 10cm which is 1 mil. My scope is 1/10mil clicks which is 1cm per click at 100m
My apologies to Ralph re scope settings; it would seem that S&B use an odd cm marking system in 1/4 cm @ 100m clicks on some models of scope.
The moa scope in the same spec has ±14moa which is ~4mils each way
So if there's 16 x 0.25 clicks that's 4 mils ???
I think I would do a test pattern at 100m and get my tape measure out!
6.5mm Creedmore is easy to get quality brass, in SRP or LRP, plenty of good loading data available. As far as "light bullets" I shoot 144gr Berger hybrids that are brilliant out to 1200yds (not tried further as yet). Hornady do an excellent heavier bullet too.
Also the advantage of 144/140gr is it keeps the MV down a little and have longer bearing surfaces so less barrel wear (I believe but happy to defer to wiser counsel).
I shoot .338LM at over 1500yds but consider it a waste of ammo/money under that distance when I can get such excellent results from my 6.5CM
There are of course other 6.5mm calibres that are excellent too (same bullets). Don't overlook the 6.5x55 Swede, in a modern action they're superb.