So I gave up waiting on the ATF to release my Ultra 7 and decided to start the break in process on my long ranger. I'll just make the minor adjustments once I can take the can home. I need to get it dialed in with the brake anyway.
The photo is my departing 3 shot group using Remington 180 grain, Premier Accutip. I had planned to burn through a box or two of the hunting ammo while I break the rifle in and then fine tune with the MK248 I have. Well, the range was particularly slow and swabbing kept taking longer than I anticipated. The sun was starting to get low and I decided to just get a 3 shot group and call it a day.
If this thing shoots like this with match grade stuff then awesome. I plan to go back out soon and put together some 5 shot groups. Either I got lucky, or the rifle is stupid accurate (or both), but it goes without saying I was VERY pleased. I had a bit of anxiety running it through it's paces for the first time out, given how much money I dumped into it and how long I waited for it to be finally completed.
This was the only 3 shot group I got for the session. I spent the first 12 rounds firing off paper. I'm not sure how many times I have to relearn the value of bore sighting before I try to jump on paper at 100 meters. Well, between swabbing and bore sighting I was trying to get away with not adjusting the cheek rest (I mean, it took me a good 5 minutes on my living floor perfecting the height/setting!). So after the first shot (not on paper) I thought, well, I'll just go through a couple of the break in cycles until they go cold and move the target in. So after 12 shots that went SOMEWHERE, I moved the target in to 25 yards. Still no dice (which surprised me. The spuhr mount wasn't far off windage wise, but I guess the 20 MOA base was a lot more severe than I had visioned it in my head). So I broke down and lowered the cheek rest, bore sighted, got on paper, adjusted/confirmed.....moved the target BACK OUT to 100 yards, adjusted a couple of times and then had just enough time left to put in one 3 shot group. This was it.
This was done on my buddies 5R .308. Its stock save for a Timney trigger and a bedding job. Glass was a Vortex Viper PST 6-24x50 SFP on a weaver 20 MOA base and Mark 4 Rings. Shot was prone @100 yards off of a bipod and a rear bag. Temp was 71. Humidity unknown.
Load: 175 Sierra match kings, 43.5 gr R15, once shot PMC brass and CCI primers.
3 shot group ended up being about .1
His shot group was slightly larger than mine, with one strung a little higher than the others.