Cienfuegos Posted March 20, 2018 Report Share Posted March 20, 2018 ¿Qué modelo es? VLD o híbrido ... ¿Qué CB tienen? low 599? (Sierra HPBT 660 / Scenar L 661) Berger, MATCH TARGET BT? Link to comment Share on other sites More sharing options...
Laurie Posted March 20, 2018 Report Share Posted March 20, 2018 This is what Berger used to market as one of its LTB models. (LTB = Length Tolerant Bullet.) It is a HPBT Match design with a tangent ogive nose. Berger generally (but not guaranteed) produces three 'Target' designs in its key weights for calibres used for competition: the plain-Jane 'BT'. (Tangent ogive, easy to tune and seating depth tolerant.) VLD (Very Low Drag). Secant ogive, often very 'finicky' over seating position. Hybrid .. a modified VLD whose lower nose profile transitions from a secant front end into a tangent type junction with the bearing surface. Supposedly, it gives the reduced drag benefits of the VLD form with the length tolerance of the BT. (But, not always in practice, alas.) Berger's three 180gn 7mm models have the following characteristics and G7 BCs. BT ................... 9.08 calibres radius tangent ogive nose. Tolerant of seating depths / jump settings. 0.314 G7 BC VLD ................ 18.79 calibres radius secant ogive nose. Slightly longer OAL than the BT. 0.348 BC Hybrid ............ mixed form nose section, slightly longer OAL than the VLD; 0.345 BC. (ie the same as the VLD but less finicky about seating depth / jump.) A 9-twist rifling pitch is optimal for the BT, but marginally 'slow' for the other two. (In practice most F-Class 284 and WSM shooters use 9-twist barrels with very good results with the VLD / Hybrid.) The 7mm 180gn BT no longer appears in Berger's product lists, so has presumably been replaced by the Hybrid model. IME, the Berger BT models shoot very well in most calibres / cartridges. If you are able to source this obsolescent model at a good price, I'd say take them. However, if maximising BC for 1,000 yard shooting is high on your list of priorities, the Hybrid is superior with its ~9% higher BC value. Link to comment Share on other sites More sharing options...
Cienfuegos Posted March 22, 2018 Author Report Share Posted March 22, 2018 Sharp, datos ... y sabios consejos. . 52 euros tienen la culpa ... es por eso que la bombilla continuó. Jajaja Gracias pd.- Mi prioridad para 900 yardas en España es la BC, lucho contra tiradores experimentados de 300 WSM. Pero para 300/600, creo que puedo usar un precio más contenido ... y pensé que era un segundo consejo, en lugar de Scenar 180L y Sierra 180 SMK. Sería bueno, por precio. Link to comment Share on other sites More sharing options...
bradders Posted March 22, 2018 Report Share Posted March 22, 2018 Link to comment Share on other sites More sharing options...
Elwood Posted March 22, 2018 Report Share Posted March 22, 2018 Now that made me smile....you're ruining my reputation Link to comment Share on other sites More sharing options...
No i deer Posted March 22, 2018 Report Share Posted March 22, 2018 You could be good at smiling Ian... Wait til you learn to laugh which is my favourite thing.it makes you feel good Link to comment Share on other sites More sharing options...
Reloader54 Posted March 23, 2018 Report Share Posted March 23, 2018 "my submarine is full of earthworms" Link to comment Share on other sites More sharing options...
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