Good day members. I did discussed the opening up of the action with Johan Greyling , my mentor, he suggested I should rather work out duplex loads for my 8x68 caliber rifle and not opening the action . He is sure I will get the required speed by using duplex loads....we in South Africa do not have the many different powders and slow powders you have in your country. By combining a slow powder with a fast burning powder I will be able to get to the velocity I want.