I'm looking for reloading tips for a 145 GR LRX Barnes Bullet in 7 MM WBY Magnum. I know my gun likes the 140 GR TSX Weatherby Factory ammo. I decided to try loading the LRX because it gets a lot of good reviews. Here is what I've done so far: Used only once fired Norma Weatherby Brass and Neck Resized Only. The necks all measure within 0.001". I trimmed my brass to recommended length +/- 0.001" and then deburred using RCBS VLD tool. GM215M Primers RL 22 Powder (my ladder test held 3200 FPS +/- 3 FPS when using 69.9 to 70.3 grains of RL 22 so I loaded my first test batch at 70.1 grains. I seated my bullets so the OAL was as long as the magazine accepts 3.375". My first shot was from a cold clean barrel. My next three shots were about 2" away from the first shot but they held a 1/2" group. My fifth shot unfortunately was where my first shot was about 2" away from the nice tight group that shots 2-3 produced. There is a chance for operator error of course. However, I'm wondering if the next time I go to the range I should wait 15 minutes (or until my barrel completely cools) for every single shot. For my session, I would shoot three shots then wait 10 minutes then shoot two more shots. The barrel never got hot, but it was definitely warm to the touch which I've heard is a no no with Weatherby. I also noticed that my seating die bottoms out on the bullet plastic tip rather than the ogive which I heard can definitely cause error. Before I load up my next batch I'm going to have RCBS help me fix this problem. I'm looking for any and all advice that experienced reloaders can give me to help me develop a sub MOA round for this rifle. Thank you!