|
|
Post by dirtydusty on Oct 26, 2023 21:38:40 GMT -5
I haven’t loaded fir my revolvers in a while and can’t find my old notes. I am loading 300hr wfn with a gas check. Anyone know what the max load of h110 is. Loading for a Bisley hunter.
What about 275 Keith style?
|
|
|
|
Post by potatojudge on Oct 26, 2023 22:08:05 GMT -5
|
|
gnappi
.375 Atomic
Posts: 1,611
|
Post by gnappi on Oct 27, 2023 7:59:07 GMT -5
I haven’t loaded fir my revolvers in a while and can’t find my old notes. I am loading 300hr wfn with a gas check. Anyone know what the max load of h110 is. Loading for a Bisley hunter. What about 275 Keith style? I thought "I" was the only poor soul who lost reloading data. I moved to my current home and somehow every speck of load data I acquired from the 70's through the 2010's. Grrr. |
|
|
|
Post by bradshaw on Oct 28, 2023 14:21:11 GMT -5
I haven’t loaded fir my revolvers in a while and can’t find my old notes. I am loading 300hr wfn with a gas check. Anyone know what the max load of h110 is. Loading for a Bisley hunter. What about 275 Keith style? ***** My start with .44 Mag and Win 296/Hodgdon 1101) Charge to base of seated bullet (figure it out). 2) Weigh charge. 3) Back off a smidge for a slice of airspace thickness of a notebook cover. 4) Weight charge and set measure. 5) Double check. 6) Seat Bullet. 7) Crimp. 8) Record load. 9) Test fire on target. David Bradshaw There is a little leeway with 296/H110 (both are Winchester 296). |
|
|
|
Post by lar4570 on Oct 30, 2023 17:41:33 GMT -5
I agree with Mr. Bradshaw. I like to load to the base of the bullet, 100% load density, I use a good roll crimp and a magnum primer for cold weather.
|
|
|
|
Post by bigbore5 on Oct 30, 2023 19:43:57 GMT -5
I load H-110 between 96-102% density for Ruger or stronger guns in all my magnum loads. Most accurate wins. Velocity is meaningless if you miss. It just means you missed sooner.
|
|
|
|
Post by bradshaw on Nov 3, 2023 9:50:30 GMT -5
It’s not good to let half a case of slow powder slosh around as the primer fires, exposing simultaneously all the powder to the heat & pressure of ignition. A small air space doesn't expose all the powder to simultaneous ignition. The narrow rpm range at which slow powder performs consistently tolerates a very limited airspace. This is distinct from fast and medium powders.
A classic .44 Mag silhouette load consists of the Sierra 240 JHC over 23 to 24 grains/Winchester 296 or its otherwise labeled H110. The charge may be reduced to 23 grains without noticeable accuracy deterioration on the ram @ 200 meters (219 yards). Dropping the charge to 22 grains may still provide ram accuracy, yet may be ragged for taking on chickens in a 200 meter shootoff.
When chamber pressure exceeds a bullet’s strength, obturation distorts balance. Some bullets in a loose launch environment gain accuracy from obturation, but this can’t be counted on as a rule, and it doesn’t equal a balanced bullet launched free of deformation.
Within the sweet-performing range of a slow powder, psi doesn’t complete the story. TTP----Time to Pressure----may well define the sweet spot.
David Bradshaw
|
|
|
|
Post by potatojudge on Nov 3, 2023 10:29:09 GMT -5
How do y'all determine what level of case fill you've got?
It doesn't seem like there's a super accurate way to measure powder column height. Are we using a drop tube? Are we compressing the powder with a dowel before measuring? How do we know the tip of the caliper isn't just poking in to the powder a little?
To use case fill is to generate your own load data, and I wonder how precise the process really is. H110 is forgiving in 357/44/45 so this isn't critical, but I've always wondered.
|
|
|
|
Post by bradshaw on Nov 3, 2023 11:01:59 GMT -5
How do y'all determine what level of case fill you've got? It doesn't seem like there's a super accurate way to measure powder column height. Are we using a drop tube? Are we compressing the powder with a dowel before measuring? How do we know the tip of the caliper isn't just poking in to the powder a little? To use case fill is to generate your own load data, and I wonder how precise the process really is. H110 is forgiving in 357/44/45 so this isn't critical, but I've always wondered. ***** 296/H110 in mag case: to measure powder height:* Lay primed cartridge case on bench. * Place bullet beside case, crimp groove or cannelure in line with case mouth; or, bullet beside case at desired seating depth. * Mark case with felt pen to indicate seating depth. * Place pencil beside case, flat eraser on line. Mark pencil at case mouth. * Fill case to line. Check depth with pencil. * Weigh charge. * Adjust powder measure to throw weighed charge. * Charge cases and double check, If you prefer, drop charge 1-grain and test fire. David Bradshaw |
|
|
|
Post by potatojudge on Nov 3, 2023 11:09:51 GMT -5
Thank you. The process is as precise as I imagined it would be.
Alternatively, though more work, you could measure the portion of the bullet that will be seated in the case, measure down from the case neck and mark the outside of the case where the heel of the bullet would sit. Trim the case to that length, fill with powder, level off the top, and weigh the charge. Solder a handle on the case and you've got a calibrated powder dipper.
|
|
