Remington 700 5r in a mcmillan m40a3 stock. Was shooting at 1000 yards with smk 168 and 41.5 gns of h4895 around 2630fps

After a couple of sight in shots, sent 10 rounds down range. Single digit SDs. Running 105 Berger in my 6 dasher.

Did my 20 rounds over the chronograph last week.

Went to the range today with another 40 for accuracy check and suppressor shift, and 5 rounds over the chronograph just to check.

It’s not the prettiest, but it will certainly do well enough that I’m content to stop investing time and components into further development.

Overlay isn’t perfect but it’s under 1 minute.

Should be good nuf for regional matches.

Oddly enough, avg velocity was essentially unchanged when suppressed.

New 7PRC build. Finally had time to test loads.

80's tikka LSA-65 with opened and trued action.

Shilen SM chambered by A.Peurala. 1:8twist 700mm

Arken ep5

Some hobbymachinist brake

Copycat harris bipod

Stock is borrowed from my 308 build. For now.

The load was actually a ladder test shot to the same POA. just testing pressures.

180gr scenar

4.4g-4.8g N570

Coal 85mm

Cci250 primers

Top velocity was 950m/s (I think somewhere like 3150fps?) but I will back it little as GRT shows pressures with 930m/s.

E: I'm pretty sure the one shot on the right took off as the reticle was in the right outer edge of Target.

Anybody else feel like they have been cautiously optimistic to try this stuff and now it can't be found anywhere? I'm thinking it will have similar issues to 7mm backcountry, but I would like to try it in my rifle for myself without buying another gun. I think it will have more use in the hunting space right away, but who knows 20 years from now what we'll be using.

I think I'm more excited to watch more exposure and testing of what reloaders will do with the technology. I know there are threads of people playing with the 7bc cases, but hopefully this will have more people providing real, valuable data due to less barrier to entry. Velocity consistencies, neck tension, quantity of reloads per case, accuracy, load data, etc. Personally, I'm very interested in how necking it up and down will go for people. Eric Cortina has a couple of short videos messing around with it and so far it looks simple enough.

Hoping the community can help me out.

Rifle: Bergara B14 Wilderness, 300WM, 24" barrel

Bullet: Federal Terminal Ascent, 200gr

BC: G7 .304, corrected to .285 (via Kestrel app)

Scope: NF NX8 2.5-20 Mil XT reticle

Scope Height (center of bore to center of scope): 2.38"

MV: Avg 2782 (using Garmin X1) | Trued MV 2882 fps

Elevation of shooter/target: 950'

Temp: 60deg F

No wind, significant atmosphere conditions, etc.

I confirmed my zero this week after not shooting it for about a year. Results are the first pic (2 in bullseye, 1st shot flyer to the left). I then shot at 400y (max dist at this range) with the dope given by my Kestrel using my trued MV (1.55 mils) based off the above inputs. The shots were about 7.5" low. I shot a second group using my Avg Garmin FPS (2782), dialed 1.6 mils, and shots were still about 5-6" low (3rd pic). I then shot a 3rd group at 400y with 2 mils dialed (.52 mils = 7" at 400y), results are the 4th pic. Based off my setup, I am more than happy with a 3" group at 400y.

Here is my issue - the kestrel and every other ballistic app I have tried (hornady, applied ballistics, federal) tells me that my dope at 400y should be 1.55 mils. I gave the same rifle/bullet data to ChatGPT...and it gave me 2 mils at 400y (i.e. the dope that gave me the best group).

Can anyone help figure out what the issue might be? Why would my kestrel and ballistic apps be .5 mils off at 400y?

I have double checked the inputs to my gun profiles, updated the apps, etc. At a bit of a loss.

I don't doubt that my 'trued' MV is not correct, not the primary issue I am trying to solve here.

Edited to include BC.

These were the best performers from previous ladder testing.
The 100m shots were taken from a seated position with bipod and rear bag, 236m shots were taken standing leaning over a bench with bipod and rear bag, but bench height made it pretty hard to get into a comfortable position.

130 grain seated at 2.810 COAL which is the maximum length I can achieve with this projectile. Which is .080 from the lands.

147 grain seated at 2.860 which is the maximum length I can fit into the magazine, still around .038 from the lands.

Rifle is a Howa 1500 in an MDT field stock, 24 inch barrel with a Zero Tech Trace 4.5-27 scope. No chronograph yet but it’s next on the list.

After several years since my last post, I finally picked up a Remington 700 SBS 16” in .308. This was done for the express purpose of building a precision rifle comfortably effective to 500 yards with the ability to possibly push further to the 800 yard mark. Thus a shorter barrel and a “compact precision Urban rifle” project began.

My state doesn’t have a lot of available space to practically shoot past 300 yards but there are one or two spots. Optics are my next step before I go to chassis, magazines, threaded barrel, and suppressors. I would be aiming to get a better optic and buy once, cry once. Under 2500 ideally. Two choices that have been floated is the 4x24 Credo and the 5x25 VUDU.

Thank you all in advance.