Hi Jerry,
great to talk to you at Raton! A lot of our guys are already saving their pennies for Ottowa, and I'll pass the links here and on AccurateShooter onto them re information and help. I can't see me being there - we have a lot of younger guys moving up in the league, and I'm already half-way to being 'Nowt but a has-been!' as a good friend and fellow league shooter here in the North of England describes himself! Anyway, one 'Worlds' is enough for the time being anyway.
On bullet weights, I don't think GB league shooters would support a weight cap, to answer your last question first. Some people shoot light all the time, some heavy, but a lot switch between them. The eveidence is that conditions in a particular match might OCCASIONALLY give a big advantage from one or the other, but that over time, there's not a lot in it one way or the other. People do like to have the choice though. It's also easy to make the WRONG choice of course - take the rifle throated for the heavies because the weather forecast says the winds are going to be strong and variable, and they turn out light and stable over the weekend - or vice versa. What people have found is don't mix and match ammo in one rifle during an event as you can get into big trouble with 1,000 yard zeroes by switching bullet weights between matches.
We have a couple of very successful GB League shooters using heavies. Steve Donaldson using 230s at some frightening MV over Viht N550, and Paul Crosby with 200gn Hybrids. Both were at Raton, Paul using 155.5s as a GB team member, Steve shooting 210s as a privateer. (I don't think he could get N550 in the States, so went for another load with the 210 VLD that he knows well.) Steve has had some very good results with the 230gn Hybrid, but he's also thrown away more matches and league points through cross-shooting than anybody else I know - and I don't think these facts are unrelated! Raton wasn't a new departure sadly - I hear that the four members of the Connecticut Yankees Rutland team that included Steve and a guy who borrowed his rifle managed to shoot on other people's targets no less than eight times - not bad going for four guys over two days!
So far as the light, fast bullet decision went, we had to standardise on one bullet, or at least weight, as did everybody else. Our wind coaches are both top TR / Palma shooters, neither of whom handloads and all their wind strength calibration / judgement was based on the 155 Sierra, so they found the idea of acclimatising themselves to say 185s never mind 210s as rather daunting. The 155 or specifically 155.5 Berger was also a bullet that everybody knows works and everybody had a rifle that would shoot it fast and well. Some people had tried heavies and not got them to work previously, so adopting anything above 200gn would have been very disruptive, and I suspect some really good shots might have dropped out.
Unlike North America, the 185 hasn't got a great following in the UK - despite my best efforts in print. Most league F/TR shooters go straight from 155 to 210 and don't trust anything in between. Add to that, that we simply haven't been able to get the 185 Juggernaut into the UK in anything like the necessary quantities ever since the typical US shooter discovered how good it is. Mid weight Hybrids haven't caught on, or have been ignored - I'd very good results with the 168gn Hybrid at ~2,925 fps MV last year, but people were really puzzled as to why I'd even want to try it.
I've gone down the heavy bullet route, and rowed back. 155s and 168s are SO much more pleasant to shoot. And easy / pleasant to use = more time on reading the conditions, which in my case is a GOOD THING. The only reason I'll use anything heavier than the 168 Hybrid in future is that I own so many 185, 190, 210 etc VLDs. But, what works for me doesn't necessarily work for others. Certainly, I don't think the GB contingent lost anything at Raton by using 155s, especially as they can be driven VERY fast with small primer Lapua 'Palma' brass, and safely at that. While our 'Open' guys were struggling to get consistent performance out of their WSMs, we 'lesser' 308 users had a couple of hours load development beforehand, found our UK loads worked despite the 30-deg higher temperatures with maybe only a little fine-tuning, and then got on with it. My elevations were excellent throughout, and if and when they did go a bit 'off', I could see all the neighbouring targets showing strikes in the same places so it was nearly always a range conditrions issue. (I shot the lot at 20-22X power on the scope and could see six or more targets at 1K with the Tubb Range target spacing.) I've got to say, I've found all the post Raton hullabaloo over alleged scope problems causing poor elevations more than a little puzzling and amusing in turn. Hey, these Americans want to come and shoot at Diggle and Blair Atholl over here - then they'll discover what wind induced elevation changes really are! Also, the US F/TR team member who wanted me to sign a protest form over shooting the 1K match in the rain on day one. If we stopped shooting every time it rained heavily, we'd hardly ever get through an event and shoot all the scheduled matches. The guy said to me that he couldn't see the target, so how could you shoot? I was tempted to say get a decent scope, but in hindsight wish I'd asked him what scope power setting he used - I bet it was far too high for the available light.