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Welcome to the forum.
Several questions need to be answered first...
1. Are you working up loads over a chrony to find what works for your barrel? So these 2 loads, they are results you obtained from your chrony workup?
2. Are you using bullet mfr or powder's mfr or published data, and starting out low and working up? Keep in mind that the published data is also based upon that source's actual barrel length, so may differ from what you have. Many sources are 24" barrels.
3. Elevation above sea level (ASL), temperature and even humidity can affect MV.
MV is affected by barrel length too but you show that as a 20" howa barel. I have shot them and they can be good shooters.
Copper bullets (the lehigh) are harder to seat against the lands so takes relatively more energy to do that, plus it is 10 gr heavier, so a lower MV for the lehigh vs the nosler would not be unexpected.
2480 for a 28.0 gr for a 100 grain cup/core like the Nosler 100, is less than the book max I show for that bullet.
I forgot what I used to use for lehigh's, I haven't shot them for quite a while."Down the floor, out the door, Go Brandon Go!!!!!" -
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agree that seems slow, seems like you should be able to get faster velocities with a bolt gun. Im getting a tad over 2800fps with a 97gn Absolute Hammer in an AR mag length COAL.Originally posted by KTP1 View Post
Will your bullet lengths allow you to seat closer to the lands? Try maxing out your seating length for more powder capacity. Dont jam the lands though...Comment
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Thank you Harpoon. Appreciate the linksOriginally posted by Harpoon1 View PostComment
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I think for the 100 Nosler's, I topped out at around 29-29.8 gr. This charge may vary based on what brass you use, they all differ as to internal useable volume. 2650-2700 for a 20" barrel.
And when I was trying the 110 chaos, believe I was getting 2575 with XBR out of an 18" barrel, but that was a max speed as I recall, definitely a warm load. Which is why we always say to start out low and work up... A bolt action like howa might get to 2600 +/- but it will be close or over 52000 saami (primarily set for gas guns).
You're of course looking for a good node and consistent accuracy, not just the max speed."Down the floor, out the door, Go Brandon Go!!!!!"Comment
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NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
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Last edited by LRRPF52; 11-29-2023, 11:21 PM.NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.comComment
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Those are all sea level, standard atmosphere. Muzzle Velocity will be the same regardless of DA, but downrange performance will be better in the thin air, higher temps.Comment
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'52s 22" velocities are similar to mine out of a 22" Black Hole Weaponry barrel. Using 31.2grs of CFE 223, I get between 2500 and 2640 depending on ambient temperatures.Paul Peloquin
Did government credibility die of Covid or with Covid?Comment
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Last edited by LRRPF52; 11-30-2023, 05:25 PM.NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.comComment
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