This page contains a Flash digital edition of a book.
Many new makes and models of bullets are included in the data section which now includes stability (rifling twist) data. The new inch and a half long Berger 200gn 0.308” Hybrid may be the F/TR bullet to beat in a year or two


be, while providing a class-leading BC. It is rated at 0.259 / 0.510 (G7 / G1 BC values) and crucially, has been designed to remain completely stable and behave consistently in transonic flight (1.3 down to 1 MACH) and also in passing though the sound barrier into subsonic speeds. To achieve this, the optimal rifling twist rate is 1 in 11.25, although the common 1-10 works well too. 1-13 and 1-12 twist barrels will stabilise the projectile for supersonic flight OK but will not produce the transonic stability benefits. Incidentally, Berger Bullet’s ballistician Bryan Litz now produces ammunition loaded with this bullet for the US market under the Applied Ballistics brand name, a non day job operation. The cartridges feature individually weighed charges, gives low (<10fps) MV spreads and Bryan has tested it at 1000 yard from a LaRue OBR AR-10 type semi-auto rifle and obtained c. 1-MOA groups. Bryan doesn’t say what MV these cartridges are loaded to, but as they are described as being in ‘the M118LR milspec sniper round class’, that would imply somewhere around 2,600 fps, so this is an impressive 1000 yard performance indeed from the new bullet. If you want to order it through our Berger importers, Hannam’s Reloading Limited or Norman Clark Gunsmith Limited, the Berger product number is 30105.


Berger Hybrids The yet to go on sale models are all ‘Hybrid’ designs that feature long secant form nose sections (to obtain high BCs) that transition into a rounded tangent shape at the bearing surface to ogive junction (to make them jump-tolerant and easy to


tune in handloads). Our top F Class shooters know the Hybrid form well as many 7mm short magnum users have adopted Berger’s 180gn 0.284 Hybrid in preference to the VLD form. Experimentally derived BCs are already available from prototypes and are listed in the table. And .... they ARE high – don’t just get fixated on the individual numbers but also compare them against other bullets of the same weight, also older heavier models. In general, each of the quartet matches or even betters the BCs of the previously best performers in the next weight up. So the new 155gn Hybrid is not only 4% more aerodynamically efficient than the current class leader, Berger’s 155.5gn FULLBORE, but beats the previous best 168gn (Berger VLD) model. The new 168gn Hybrid has a marginally higher BC than the 175gn BT Long-Range and so on right up to the 200gn Hybrid at 0.320 being only 0.001 adrift of the 210gn VLD. American shooters have been given samples of the 155, 168 and 185gn


models and are currently reporting back to Berger Bullets on real-life on-range performance; the 200gn model has yet to appear. Even Bigger and Better – Applied Ballistics for Long Range Shooting by Brian Litz How do we have experimentally derived BCs (not computer generated theoretical values) for bullets that aren’t even on sale yet in the USA never mind the UK? Simple – we have one of the first copies of the second edition of Applied Ballistics for Long- Range Shooting also by Bryan Litz, an astoundingly active gentleman!


This is a tome that has become our handloading man, Laurie Holland’s, favourite bedtime reading if not bible. It now has more pages than the original edition (578 v 536); much expanded chapters and some completely new topics such as Extended Long Range stability and ballistics (that is over 1,000yd up to the 2,000yd sort of distances); data on a much larger number of bullets (c. 230 v 175) including makes omitted in the first edition – Cauterucio, Cutting Edge, Dietlein, GS Custom, Matrix, Norma, Precision Ballistics, and Wildcat.


You still get a CD-ROM for a nice little ballistics program. We’ll provide a review soon. The other news here is that F Class world champion Gary Costello has ordered a considerable number of copies of the second edition for British shooters through his company March Scopes UK and they may be here by the time you read this. The website and email are: http://www.marchscopes.co.uk and info@march- scopes.co.uk


Target Shooter 9


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