The Westley round was slightly different to the H&H but I should think they would interchange. Westley's would confirm but they may not exactly regulate. Note that it has 2 1/2" chambers. The early Holland paradoxes also had 2 1/2" chambers too. Holland have their ammo loaded for them by either Gamebore or Hull Cartridge Co.; I think the latter, but it will be expensive. Did some experimenting with a friend's paradox and found that it shot perfectly with Sellier & Bellot stuff which come in packs of five. It comes in a 67.5mm. case which is o.k. for 2 1/2" chambers and uses a 32 gram. (1 1/8th. ounce) Brenneke slug. All at a fraction of the cost of Holland's ammo. May be worth a try if you can source some. Lagopus.....
