480gms is not exactly that heavy for a tweed, I'd call it a medium weight cloth. Colour and pattern look good, something I would be tempted to order.
I meant that I have struggled to find heavy cloths in India. Even firms who might be having such offerings in other markets do not offer heavy cloth in India.
The brown/orange fabric third from the top is very nice
Even I like it very much. I also saw a Zegna Trofeo cashmere (95% wool & 5% cashmere ) cloth which had a much better feel than the Gamekeeper Tweed but the Zegna was 3 times more expensive that the H & S Gamekeeper.