Requesting 7 MM WBY Recipe for Barnes 145 GR LRX Bullets

[chesspunker]

Has anyone had any luck reloading 145 GR Barnes LRX Bullets in their 7 MM WBY?

I'm looking for tips to dial in a sub MOA round. Currently I'm using Reloader 22, Factory WBY brass (neck resized) and trimmed to +/- 0.001". I deburred my cases inside and out and used the new RCBS VLD chamfer tool. I also deburred my flash holes. I'm using GM215M primers.

I did a velocity ladder test and found a range of powder that produces very close to the same speed. Between 69.9 grains of powder and 70.3 grains of powder the muzzle velocity stayed from a low of 3198 FPS to a high of 3203 FPS.

I loaded 5 rounds at COAL and another 5 rounds as long as my magazine would handle and both groups I shot were around 1.75" which disappointed me! I thought that since I found that speed node that the gun would shoot a lot better.

I used a Caldwell "the rock" front rest and Protektor rabbit rear bag and felt very steady.

My gun was perfectly clean before each 5 shot group and I discounted the first shot from each group.

I'm looking for advice and how to tighten things up. I heard that lead sled rests actually make groups worse on high powered rifles, but I'm thinking of trying that next time to see for myself.

[MongooseV8]

Barnes like a big jump 0.060" minimum and usually like to be on the faster side. I cant give you any 7WBY specific loads but Ive shot several hundred Barnes mono bullets in a couple dozen firearms. All have liked a big jump and lots of speed.

[chesspunker]

Thank you Mongoose. With all Weatherby caliber rifles, the jump is huge into the rifling! Even if I load as long as I can to where my bullets still fit into the magazine i'm still about 0.300" away from the rifling. However, I'm going to try and go up in velocity and see if that helps. I had another accuracy node when I did my ladder test around 3300 FPS and I think I'll try that next.

[MongooseV8]

Oh wow thats a crap-ton of jump even for a mono bullet. Another thought is I have read some accuracy complaints using the LRX version but Ive never used them myself. Can you try a 140 TTXS instead?

[chesspunker]