Well, now at last, I have tested my .223 300mt project properly, and I used the new, only just available in the UK GGG .223 Rem match 77gr ammo, which uses the Sierra Match King HPBT bullet. The initial shoots were in awful wind conditions, but at last a sensible condition week end at Bisley, although the 300 mt range on Century range ten is never easy as the wind swirls in that corner.
The conclusions? I'm afraid there are several caveats, and its not conclusive, but the thing is a tack driver! Even at 300 mts when its pointed at the middle, that's were it goes!! The ammo, is superb, we do reload 6mmBR and the objective of this project was to shoot factory .223 ammo to, a) save the hassle of reloading, and b) to provide a cheaper option than factory 6 mmBR, the GGG 77gr does both, and at £85 ish a hundred is around what we can load 6mm for, and frankly seeing the results, I can't see why any one would bother to reload, they are unlikely to get better results, and its not worth the hassle (see point a)!).
So what's the caveat? After several shoots at Bisley in heavy wind, we eventually had a light wind week end (light for Bisley!), but it was still fish tailing and changing in strength, so the first real test of the accuracy, and the .223 was still very tricky to keep in the ten ring, not to mention the X ring. The 300 mt ten is 100 mm across (the X, 50 mm), and on the slightest wind change, and on a light wind fishtail (from left to right) with the 6 mmBR it usually held the edges of the ten, or a close nine, with no sight adjustment, but the same change put the .223 either a bad nine or an eight! When the shooter had the wind right, and pointed it at the middle, that's where it went! I had one five shot string, when I achieved that, and it was all X's, and inside a 25 mm group, but miss the slight wind change, and you are in the 8 ring! And its a 60 shot match, not a five shot group!
Over a week end I shot two 60 shot matches with it, and my wife (who is a top level shooter) also tried it, we both got similar results, and both came to the same conclusion.
It is superb to shoot, the low recoil is nicer than the 6 mm, it is fantastically accurate, the GGG 77 gr ammo is excellent, and well up to the job, BUT it relies on the shooter being a superb wind judge, or having dead flat calm conditions, to get competitive scores, or even get with in 10 points of a 6 mm score in the same conditions.
Maybe, if I reloaded, and went up to the max on bullet weight, 80gr or 82gr on my barrel twist, and stoked up the rounds a lot faster, it may shoot the wind better, but that defeats the object of the project, to shoot cheaper factory, and to save the hassle of reloading, and we load 6 mm now for the same cost and it shoots as accurate and a lot better in wind.
Another plus point for the .223, it certainly bucked up my concentration on wind judgement!
So I think its going to get reserved for those rare flat calm days, or some local training at 100 mts! I'd be interested to hear how Michal is getting on with his in Poland?
Have fun
Robin