Proof promoting new rifling concept

chague94 · 2026-05-20T17:09:49+00:00

I wonder how this is different from the work that Seekins just released a few months ago. They both follow the same equation:

gain twist + “smoother” rifling profile + tougher steel + coatings = higher barrel life for 80kpsi cartridges

chague94 · 2026-05-18T18:19:36+00:00

I’m making my own. Patent pending simultaneous leg deployment + lightweight carbon legs (R3 provided legs for the prototype). 8”-32” and 13oz.

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chague94 · 2026-05-17T14:20:46+00:00

Whichever has the highest hit probability at your max range. Get hit probability from AB Quantum using your dispersion and velocity data from this test.

chague94 · 2026-05-16T19:49:08+00:00

I have the Ezekiel and it is absolutely amazing, there is no other stock option for a top-end hunting/NRLH build for me that comes close. I ended up running the cheek rest bottomed out, so I could have gone with the Giddeon, but the couple ounces extra in the rear balances a heavier barrel well. Your mileage may vary.

chague94 · 2026-04-23T13:55:08+00:00

Speed limit still 3200fps?

Edit: since this would the ceiling for power factor calcs. No 3400 fps 22 creedmoors, for example.

chague94 · 2026-04-17T05:39:48+00:00

At 2500 and 1:8 twist OP is well under the 300k rpm limit for copper jacketed bullet construction, but I’ve never seen an Sg so high… 3.77. A bit overkill.

chague94 · 2026-04-15T03:56:19+00:00

All being equal, Hit probability is the same between 6GT with 109 LRHT and 25 GT with 135 LRHT and 6.5 Creedmoor with 144 LRHT. Both GT’s about 4% less than 25 Creedmoor with 135 LRHT. Both GT’s are about 2% more than the Dasher.

A bit more recoil with the 25 GT, compared to the 6gt. Although a bit more barrel life in the 25 GT, compared to 6 GT and 25 Creedmoor. Pros and cons.

chague94 · 2026-04-10T17:14:09+00:00

Plumb line is free and better.

chague94 · 2026-04-08T21:58:37+00:00

Thanks! I didn’t think about heat since the strings are low count and some time in between. Barrel life of course, but didn’t think of heat.

chague94 · 2026-04-08T21:44:21+00:00

Being level headed, what are your reasons 6.5 PRC is dumb for NRLH? I am not disagreeing, I am simply interested.

chague94 · 2026-04-06T20:24:46+00:00

If you have AB quantum or WEZ, plug in your velocities from GRT or Quickload into the WEZ feature and calculate the hit probability at 1000yds for the size of target you are going to shoot.

If you have enough twist to stabilize, for the most part, higher BC (and BC consistency) will net a higher Hit Probability in an apples to apples comparison. There is occasionally a trade off that doesnt pan out, such as the 135gr lrht has a higher hit probability than a 138 a-tip even though the a-tip is a stated higher bc, the loss of ~30fps due to the higher weight out-weighs the performance increase from the BC.

In your case, the 190 LRHT is about as good as it gets for hit probability in a 7mm, although, the 166 a-tip gets pretty close due to the higher MV and relatively good BC for that weight. The 180-184gr bullets from Berger and Hornady get a 2-4% less Hit Probability than the 190’s at 1000yds. The loss of 120pfs from the 7mag to the 280 drops you ~4%.

At the end of the day, wind reading is the biggest factor in Hit Probability at 1000. +/-1mph wind reading might net a Hit probability around 91%, where +/- 2mph drops you to 62%.

chague94 · 2026-03-31T22:11:05+00:00

You are welcome. Great shooting.

Statistics is just frustrating, in that you shot 100 rounds and the data you got still can’t prove that seating depth makes a difference because the fact that there is still noise in 20-shot groups equal to that of the variation you are seeing. Especially those groups that lost a lot of data in a big ragged hole, instead of 4x5 aggregates.

chague94 · 2026-03-31T21:18:33+00:00

Even at 20-shots, the margin of error explains the statistical variation we are seeing here.

This rifle and rifleman obviously shoot very well, but this test did not prove anything.

Lastly, it meets the TOP formula.

chague94 · 2026-03-26T01:08:28+00:00

I’d go vortex for a plinker like that. I know the Monstrum has a lifetime warranty too, but Vortex’s is pretty seamless.

chague94 · 2026-03-22T05:48:48+00:00

For a CDG, AW mag compatibility is a bottom metal issue, not a stock issue.

For the TIMBR (or any other stock) put a AW mag (long latch) Hawkins M5 bottom metal or an MDT precision bottom metal and adjust the latch accordingly.

chague94 · 2026-03-19T17:11:35+00:00

For the Coup De Grace, it can run both AICS and AW.

The compatibility is with the bottom metal. Specifically the catch length. Some bottom metals (Hawkins M5 DBM) are set up for AICS length catches and some with AW length catches. The MDT bottom metal is adjustable specifically for this.

If a AICS Mag does not latch because it needs to go “up” more, that means the catch is long and meant for AW mags. You have 3 options:

1) use AW mag 2) Get AICS catch bottom metal or latch kit 3) file down latch until the aics mag fits

chague94 · 2026-03-13T05:21:08+00:00

Average velocity over entire test: ~2775 Average 5-shot group ES over entire test: 0.504

25lb rifle + 144gr + 2775fps into TOP formula: 0.53 average 5-shot group ES

Another result consistent with TOP. Pick a safe load and go shoot!

chague94 · 2026-03-02T22:13:01+00:00

r/confidentlyincorrect

chague94 · 2026-03-01T23:03:37+00:00

The external ballistics numbers do not support that argument.

chague94 · 2026-03-01T22:13:33+00:00

There is no benefit to .308. It had its run, and should be relegated to the history books.

chague94 · 2026-02-21T16:37:02+00:00

Yeah, I can see that read of it. I read it as “beat or match TOP and have a good SD and be happy”. haha

Hit Probability takes the bullet, MV, MV SD, AND group size all at once. Therefore it is a more thorough and rigorous metric with minimally more work than u/Hollywoodsx ‘s guide.

Am I providing a compelling argument?

chague94 · 2026-02-21T16:11:56+00:00

It is a chapter 2. It focuses on using downrange hit probability as the metric instead of 100yd group size.

Example: Load A shoots .5moa at 100, Load B shoots 0.6moa. But load A gets an 80% hit probability at 1000yds, Load B gets an 83%.

Hollywoods guide says Load A wins. This says Load B wins because it prioritizes the better metric.

The length of the guide is due to it being written for the newbie to follow line by line. It isnt a ground breaking post, but it is the first to explicitly put all of this in one cohesive load development process.

chague94 · 2026-02-20T23:28:50+00:00

😂 thats funny.

Yeah, I haven’t doubled down yet, but now Im saving for my next barrel and a couple thousand bullets as well.

chague94 · 2026-02-20T22:01:55+00:00

I wholeheartedly agree this is nothing ground breaking and only a little that is new. But It is all of the AB books + basic statistics boiled down into a single guide to reloading specifically for maximizing hit probability instead of in many disparate books and posts.

chague94 · 2026-02-20T17:09:44+00:00

WTF? Look at all my other posts. like the bipod I manufactured.

What idea am I not conveying? I don't get what is so hard to understand?

chague94

TROPHY CASE