J-Bar
Member
For those who have not been following my posts, I wanted to download my Ruger #1A Light Sporter (20" barrel) .270 Winchester because factory loads have become painful in my arthritic/bursitic shoulder.
The discussion about which powder to use:
https://www.thehighroad.org/index.php?threads/downloading-the-270-winchester-which-powder.842334/
The discussion surrounding the first reloads:
https://www.thehighroad.org/index.php?threads/first-target-downloaded-270-winchester.842552/
Today I tested some downloaded cartridges for group size. I followed the spirit if not the letter of Olympus's suggested outline.
Hodgdon's online data gives a maximum powder charge of 47.5 grains of H4895 under a 110 grain Hornady bullet. The reduced loading minimum guideline for H4895 is 60% of the maximum charge, which in this case would be 28.5 grains of H4895.
I started at 29.0 grains, and loaded three cartridges each in half-grain increments (rather than the 0.3 increments Olympus recommended.). My test ran from 29.0 to 32.5 grains, and gave me the information I need.
I am quite proud that at 74 years of age, with early cataracts in both eyes, using a Ruger #1 with factory trigger and a Leupold 4 power scope, firing hand loads made with a cheap Lee Loader handheld tool, that I could produce these results. My best group was 0.513 inches at 100 yards, produced by the 29.5 grain powder charge. The second best group was 0.675 inches using 32.0 grains of H4895, which was only slightly better than the 0.859 group fired with the 30.0 grain charge. The recoil felt like a light load in a .410 shotgun; absolutely delightful! There is no way I could have endured that many rounds of factory ammo, but I can shoot these all day long.
Hodgdon's 2018 Reloading Annual Manual shows a load for the 6.8 Remington SPC for the Hornady VMax .277 bullet, the same one I used, that produces a muzzle velocity of 2550 FPS with 29 grains of H4895. So I think my loads will be playing in this same ballpark; 2600 FPS thereabouts.
My next step is to load up 20 or so of the 29.5 grain loads, get the scope adjusted to about 2 inches high at 100 yards, and then see what it does on a whitetail.
Edit/Disclaimer: I assume no responsibility for any adverse results if you choose to use my loads in your firearms. Please do your own due diligence.
Thanks for helping me get this far.
The discussion about which powder to use:
https://www.thehighroad.org/index.php?threads/downloading-the-270-winchester-which-powder.842334/
The discussion surrounding the first reloads:
https://www.thehighroad.org/index.php?threads/first-target-downloaded-270-winchester.842552/
Today I tested some downloaded cartridges for group size. I followed the spirit if not the letter of Olympus's suggested outline.
Hodgdon's online data gives a maximum powder charge of 47.5 grains of H4895 under a 110 grain Hornady bullet. The reduced loading minimum guideline for H4895 is 60% of the maximum charge, which in this case would be 28.5 grains of H4895.
I started at 29.0 grains, and loaded three cartridges each in half-grain increments (rather than the 0.3 increments Olympus recommended.). My test ran from 29.0 to 32.5 grains, and gave me the information I need.
I am quite proud that at 74 years of age, with early cataracts in both eyes, using a Ruger #1 with factory trigger and a Leupold 4 power scope, firing hand loads made with a cheap Lee Loader handheld tool, that I could produce these results. My best group was 0.513 inches at 100 yards, produced by the 29.5 grain powder charge. The second best group was 0.675 inches using 32.0 grains of H4895, which was only slightly better than the 0.859 group fired with the 30.0 grain charge. The recoil felt like a light load in a .410 shotgun; absolutely delightful! There is no way I could have endured that many rounds of factory ammo, but I can shoot these all day long.
Hodgdon's 2018 Reloading Annual Manual shows a load for the 6.8 Remington SPC for the Hornady VMax .277 bullet, the same one I used, that produces a muzzle velocity of 2550 FPS with 29 grains of H4895. So I think my loads will be playing in this same ballpark; 2600 FPS thereabouts.
My next step is to load up 20 or so of the 29.5 grain loads, get the scope adjusted to about 2 inches high at 100 yards, and then see what it does on a whitetail.
Edit/Disclaimer: I assume no responsibility for any adverse results if you choose to use my loads in your firearms. Please do your own due diligence.
Thanks for helping me get this far.
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