Welcome, visitor! [ Login

300PRC Ladder-loads and Initial Groups

AmmoSmith - Reloading Tips and Examples, Range Days 2021-10-13

Took the new Mile Rifle to Skyline to group in @ 200yds and run the 2n’d round of ladder loads. All rounds with H225 ELDM over 7828SSC or N565. I shot all but the hottest rounds for each powder, making a specific point to leave the hot rounds for next time – enforce the It’s OK to not shoot all bullets. I was expecting bolt lift on some of the hotter rounds but it was silky smooth through all rounds on ejection. There were a couple of rounds that were hard to chamber. In general the slower rounds were pretty soft shooting. Not doubt the EC Tuner brake helping with that. I did notice some recoil on the hotter rounds. All brass looked good with primers starting to flatten out on the hotter rounds. There were ejector marks on bras before I got it, and there are marks on these fired cases, a bit more prominent on the hotter rounds, but I’ve seen worse.

As far as velocity goes, I was able to get almost 3000 fps with both powders. N565 has better fill at 80.0gn @ 2950fps. 7828SSC had 77.0gn @ 2977. I loaded a couple of lower charge test groups with turned necks and shot them as well. The lower charge group of 7828 69.0gn had an excellent 1/2MOA 200yd 3-shot group! It was the first group I’ve ever shot with this rifle. I loaded 5 shots in these groups but the first 2 shots were to get on paper. First shot was way high because I had the base left at 25MOA. set to 0 and took another shot and spotter said I was way low, just above the lower PVC cross-pipe of the target stand. I backed the scope out to 24x where the hashes are 1MOA. I then used the hashes to measure rise to center of target to be 15MOA. Made the adjustment on scope and BANG, first shot dead nuts center. Second shot left me looking but with tighter new 50x F class glass I was able to tell that the 2nd shot piled into the same hole. I spotted it before my spotter actually and started laughing. Third shot was a tad low but I’ll take it!

I need to lower the cheek riser just a tad more if possible. The IveyTron is pretty tall, so I just use a low cheekpiece, tilt my head and use my left side dominant eye. It is just a tad too low and I can see just a shade of the top of the scope looking at the target. It’s a note when using the tall adjustable base. I will say that I didn’t notice the new 4″ brake on the end of the barrel so need to also keep that in mind when shooting LR with lots of elevation.

My shooting buddy/spotter brought his pro chrono that hooks up to blue-tooth and it worked great. Took a minute to get it settled up with the phone, but after that was smooth sailing. Additionally with that setup you can preload your groups to chrono instead of doing that at the range. That can save a lot of range time and keep things moving. The Lab Radar is nice, but the cost and functionality of the pro chrono would be my choice.

Next up is loading up some more of the 69.0gn of 7828SSC, anneal the other cases, then neck turn 40 more cases, leaving 1/2 of them turned and 1/2 1x fired.

   

943 total views, 1 today

  

  • CZ97 Old vs New - .45ACP Double Fisted FUDDRUNNERS

    by on 2022-02-19 - 0 Comments

    So, I got bored and made a new video about new(to me) old CZ97B Safety model.I got some video editing practice. Digg the 97s (CZ FuddRunner) – it was a great day! The trigger action and shape of the older one has the slight nod, but the newer model has better sights and LOK grips(upgrade). […]

  • Bike-Athlon Training form

    by on 2023-07-30 - 0 Comments

    Are you interested in Roadbikes and Race Pistols? Do you want some practice with a favorite 2A folder and see how it packs on your new Mountianbike? Come pack it and run it. Here is the contact form for upcoming training rides and possible local friendly competitions. Basically I need a draft partner(right now its […]

  • From YouTube to Rumble and found another great 6mmARC 1k build success

    by on 2022-01-16 - 0 Comments

    We all have things to work on… I try to be the person to at least think those words when disposition comes along. I’m starting to feel really great about breaking bad habits. In particular for today is You Tube… So I started up Rumble and what do you know one of the first things […]

  • 6mmARC Brass Forming From Straightwall Blanks

    by on 2021-04-13 - 0 Comments

    Disclaimer: do your own research and use common sense when reloading. I am not responsible for your results. Don’t try this at home or at home office either… Here are the steps that worked for me. I wouldn’t even attempt this without a great annealer. That thing is worth its weight in brass. Scope footage: […]

  • 1k Match Results

    by on 2021-06-30 - 0 Comments

    Executive Summary – it was windy, I learned a LOT about wind today. So windy in fact many of the more experienced shooters had issues with the wind. There was “supposed” to be an option for 1250 yds, but that was nixed due to wind. I have shot this gun 6ARC and ammo at 1k […]

  • 16.5" MaddMacs / Ruger Mk 4 pistol match ammo testing

    by on 2021-12-06 - 0 Comments

    Ive been looing forward to this test for a while and finally made it to the range to make it happen. The goal was to test High Velocity match ammo @200 and see if I could have a 50yd(or 100yd) zero and use BDC reticle out to 200yds. The Rig: Ruger Mk 4 lower gutted […]