Hi all, new member from western Washington. I recently put together a 22 creedmoor that shoots 90gr bergers pretty good and took my neighbor and his 14 year old shooting yesterday and saw they had a 600 yard competition in October. Would be fun to give it a try and let my neighbors give it a go. Problem is hard to find bergers. Was thinking about 88gr Hornady but hear they might come apart if I push them to fast. I have a 5r 7 twist and looking for a suggested speed with that combination?