I want to try to set some loads up for a .455 Webley MKIV which has not been machined for .45ACP. It seems to chamber the std Webley rounds and also the std 45 Auto Rim rounds, but I have heard the 45AR is too high pressure so I won't fire it. The std Webley ammo is very expensive and I would like to try to reload some. Have any of you guys done any .455 Webley ammo..what worked and what was too hot?? Thanks.