Comments on: Tactical Transformer: .243 Win Becomes a 6-6.5×47 Lapua https://bulletin.accurateshooter.com/2015/07/tactical-transformer-243-win-becomes-a-6-6-5x47-lapua/ from AccurateShooter.com Mon, 06 Jul 2026 15:01:41 +0000 hourly 1 https://wordpress.org/?v=4.1.26 By: rob https://bulletin.accurateshooter.com/2015/07/tactical-transformer-243-win-becomes-a-6-6-5x47-lapua/comment-page-1/#comment-48212 Sat, 11 Jul 2015 21:25:02 +0000 http://bulletin.accurateshooter.com/?p=56712#comment-48212 I am finding the reports of a relative spate of modified 243 Win’s to be most interesting. That’s because last fall I decided due to my owning a set of CHeetah forming dies, too many Lapua 308 Palma cases and a general distain for the 243 Win on a way to fulfill my years ago stated desire “to be the first kid on my block with a 6 X 47 Lapua.”

What has resulted is something the gunsmith and I call the 6 X 49 Lapua, a case that is half way between the 243 and the 6 X 47 in length but with a longer neck (0.302″)and 30* shoulder. I have not been able to shoot it enough to determine the load(s) make up exactly as yet (hip replacement), but a couple of preliminary tries suggest HY100 and/or 4000MR as good prospects along with the 450 primer. 105 Berger velocities are above 3200 fps using either of the above. Time will tell the accuracy and velocity potentials more precisely.

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