On the bullet supply and cost issue, yes there are carriage and UK import / VAT additions to US prices. Before we do our usual British act of beating ourselves up though, remember US ITAR (International Traffic in Arms Regulation) regulations and the accompanying Orwellian US State Department export licensing scheme which adds substantially to the workload, time and of course costs given that US permits are VERY expensive in order to export almost any American firearm or ammunition product or component. In practice, it means that if you're an American manufacturer or dealer and you can sell all your product to your home market, you've got to be very either very stupid to export it to us, or (I'd like to think) very mindful of customer relations and the longterm view of keeping other markets open.
Products are available in the USA? Maybe, if you spend all your time checking local dealers and/or shooting forums. Even today, US forums are hosting posts that say things like 'So & so has VarGet in stock', then a day later saying 'Shouldn't have posted that - it caused a rush and the shelves are empty again!' If quality bullets are so widely available in the US now, how come three-quarters of Hornady's product lines are still shown as 'temporarily suspended' (so that the company can concentrate on maximising its production of those lines in greatest demand) or that Berger Bullets increased output by 45% in 2013 over 2012 and still ended the year with increase in its back-order situation? Berger is adding yet more bullet making capacity, so that sometime this year it will have doubled output over an 18 month period.
See:
http://bulletin.accurateshooter.com/?s= ... mit=Search
As far as the Dyers go, I tested them around three years back when the Dyer family still made them and found the same as Maggot - they're very consistent. Although a VLD type with an aggressive secant ogive form, like Steve Thornton I didn't have any trouble getting them to shoot and having to play with jumps. My usual starting position of 15 thou' 'out' worked fine straight away in a 1-10 inch twist Broughton and I had some very good Diggle match results shooting them over a relatively mild N150 load producing ~2,910 fps. Steve used to have a lot of fun made at his expense by other GB F/TR team members over using 'cheap Aussie shrapnel', but since he came 12th overall F/TR ex around 200 in the F-Class World Championship at Raton last August and beat nearly all of the GB Berger users, this seems to have dried up for some reason or other!
Insofar as the Litz .30 155gn bullet review went which I co-wrote with Bryan, he looked solely at the BCs, drag related design factors, and ballistic efficiency. The most ballistically efficient bullet in its class may not shoot well in YOUR rifle for all sorts of reasons. There is an old saw - let the barrel tell you which bullets it likes. Precision in an individual rifle or barrel is quite distinct from the ballistic efficiency aspect although the latter may influence the former if it involves a VLD design form. So if your barrel much prefers say the Sierra MK over the HBC or vice versa, that has a greater influence on scores especially at short to mid ranges than even an apparently significant difference in BC values. That's one very important reason why the Bryan Litz designed 155.5gn Berger 'BT Fullbore' has been such a successful bullet, and the apparently more efficient 155gn Hybrid is selling nowhere near so well at the minute - the 155.5 is not only ballistically nearly top of the class but is a very tolerant easy to tune design that works well in most match barrel internal dimensions and twist rates while the Hybrid doesn't seem to be as easy to tune in this respect.
