This is my first time doing this, so I took my out my 9" MCX in 300 BLK to work up a load. Shot off a bipod at 100 for the first time and slapped a 3-18 scope on there (I shoot this thing in close with an aimpoint or irons). Using CFE BLK and 155 Palmas, the best 3 shot group was just over an inch. 2 of the groups on the hot side shot ascending, traveling up 4" from the first to last shot. It almost looks like a loose scope mount, but I think it was on tight enough. Shot suppressed, no endcap strikes or anything. The center group is the best, so is this about what to expect out of a 9" BLK, maybe fine tune it a bit? The loads were shot 20 gr - 18 gr descending in .5 increments, top left, low left, middle, top right, and low right
- Thread starter mdmp5
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Do you have a chrony , and I've always used .2 increments as per OCW method, .5 seems like a easy way to blow right past the node with such a small case capacity/charge weight
If you have a chrony try .2 increments and find a spot where velocity flattens out , that will be your node then run a seating depth test
I never had any problems making sub-moa out to 300 yards with a 12.5" 6.8 premium barrel and factory Hornady SST ammo. Given the small size, an SBR can be hard to shoot well. No idea what that particular gun is capable of.
My bolt action and semi-auto .300BO's have been very picky on ammo. Continue to dial in your recipes and you should be GTG.
True. Is it a sporter/pencil barrel? What is your twist rate?
You may be heat stringing more than a wobbly load if you're not waiting for the barrel to cool between shots, or it could be a combination of the two.
All that said, I have plenty of rifles that were a bear to try and get to shoot a minute. I think my record is a .220 Swift that I probably went through fifteen different bullets, and every powder there was a recipe for.
You may be heat stringing more than a wobbly load if you're not waiting for the barrel to cool between shots, or it could be a combination of the two.
All that said, I have plenty of rifles that were a bear to try and get to shoot a minute. I think my record is a .220 Swift that I probably went through fifteen different bullets, and every powder there was a recipe for.
