Why Not? Supposedly the GT's primary selling point is improved feeding. Yet the GT's 35 Degree shoulder design could be attributed to numerous feeding issues with the GT. By implementing the BR's 30 degree shoulder while also lengthening the Neck it should provide a superior design for better feeding. The BR is a very well established design loved by thousands. These same shooters already have hardware for the BR and just might consider this an option. Any small percentage of capacity loss is negligible and might actually be welcome by shooters. Of Course without premium brass the GT might not be attractive to all shooters. Thanks for the reply.I reading this forum wondering,(why?)