I have done a search looking for some numbers on the 7 Lrm but haven't found much on it. I know it's pretty new but I figure there are enough of them out there I could get some ballistics on it. I've read on Gun Works web page that it will run the 180 @3100 under 72gr of H1000 in 26 inch tube. That seems like its just a hair hotter than a 7 Rmag. I've would like to hear from someone that has one what the case capacity is and some known velocities are and what barrel length you are running to achieve them. I'm gonna build a big 7 and its a toss up on weather to build a 7 lrm or 7x300 win mag or version of. I have most everything I need just need to pick a direction a go. One thing I would like to know is I have a 1-8/5 twist barrel just wondering ho much this would slow either on of them down and what length to run. It's a 31 inch blank.