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25 creedmoor

Jcalder

Jcalder

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Sep 18, 2012
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Decided to build a 25 creedmoor. I know a few of you guys have asked for progress, and I'll do my best to keep it updated. Preferred barrel blanks made the barrel, with .150" freebore vs the standard offering. 1:7 twist, 20" long. Eventually, I'll have a suppressor on it. Used a tikka action, they're relatively cheap and I can get prefit barrel. I was able to do all the work myself. Trijicon credo 2.5-15 scope
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Initial testing had me looking for pressure. There's not a ton of info out there, but I knew I needed to start around 40gr of h4350 with the 134 eldm. I ended up have a slight ejector mark at 44.5. I do know some guys got over 3000 fps, but I'm sure their barrels were much longer. I did shoot one at 45gr and had an ejector mark as well Wasn't bad, wasn't a swipe, but was there I'll not go over 44gr at this point.
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I did try a group at 42gr during my pressure test load and was happy with the accuracy, but the speed wasn't hardly there. I may come back to it, but we'll see.
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Decided to start at 43.5 and 44gr. 44 wasn't great, 43.5 was much better but I was on a spongy bench. The one "flyer" ruined the group, but it's promising.
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Went home and shot off a better bench. Results certainly changed. Here's 12.
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I made a slight scope adjustment, and shot 3 more.
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Currently I'm at .020 off the lands. That's usually where I start and have had good luck. It was suggested to try .050, so that'll be the next test group.
 
Shot again today. Tried .050 as suggested and it wasn't any better. Ended up getting ejector marks, which is weird. The initial test I tried 42gr, so I loaded 5 at .050" jump and other than a flier, it was great. Not sure what to do about the flyer so I'm open to suggestions.

42gr at .050 jump
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Jcalder said:
How would you run your ladder? 43 and 43.5 are terrible. I've got 41.5 to try.
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My suggestion is if you can, run a true ladder anywhere between 400-600 yards, looking at vertical dispersion. Once you find a node with 3-4 consecutive shots with minimal vertical dispersion, hone in on a powder charge in that node and then adjust seating depth.
 
markwondi said:
My suggestion is if you can, run a true ladder anywhere between 400-600 yards, looking at vertical dispersion. Once you find a node with 3-4 consecutive shots with minimal vertical dispersion, hone in on a powder charge in that node and then adjust seating depth.
Click to expand...
But I do understand what you're talking about doing
 
Back at the range. Little wet this morning and the mosquitos were out in full force, but I managed. Last outing 42 looked ok, but as stated above, it's probably not in the proper sequence. Tried 41.5gr and first shot nearly missed paper, made a 2" correction and shot 4. I'll load more and confirm, but I think this is where I'll stay.
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Went back out this evening after loading more. Shot 8 more into the 4 shot group from yesterday. As expected, group opened up some, but still highly acceptable. 12 shot group
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Decided to throw the magneto on get some velocity readings. I averaged 2630, 2647-2612 was the spread, with an sd of 11. Not bad.

It was at this point I got a phone call and was letting the gun cool down. Something looked off and it took me a minute.
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Guess that explains why my scope moved 2" when I was shooting yesterday, vs the last time I had shot. So I would expect this rifle to shoot much better when I get the ring situation fixed.
 

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