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Thread: 358156 & H-110 in a Ruger Blackhawk

  1. #1
    Boolit Master

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    358156 & H-110 in a Ruger Blackhawk

    For years I have used reduced loads for general shooting and practice. I had found that the reduced loads usually gave better accuracy, plus I could shoot them for an extended session, without getting fatigued.

    I never messed with H-110 at all in 357 Mag. In 44 Mag I would load up some jacketed, to use deer hunting. I never really tested it extensively, just loaded a recipe that gave 'good enuf' accuracy at 75-ish yards, and went looking for venison.

    I got a wild hair a few weeks back. I had acquired a Lyman 358156 mould - a gas-checked SWC, the one with 2 crimp grooves. Mine is an older version, and drops CWW/Pb at 160-161 grains, checked and lubed. I figured that the boolit had been around forever, and load data was easy to find. Why not.

    I found data for H-110 all over the place; both physically, and in charge weight. I had always heard that H-110 likes the higher pressure range, so I ignored the 11 grain start point I found in some places.

    Using PMC brass, and CCI 550 (SPM) primers, I loaded up some rounds. A few each with 14, 14.5, and 15 grains. I took the Ruger 6.5" Blackhawk (1978 manufacture) out behind the barn, and fired a few. Rested, at 50'.
    Here's what happened.

    14.0 gr, 12 shots. Remember, this is rested, on a pretty rickety bench, but rested. At 50'.

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    Ahem.

    Yes, well. I could barely keep them on an 8.5 x 11 paper. Oh my.

    I reshot it, same load with different lube, with pretty much the same results. Now, I'm not the best shot in the world, but I'm better then that. At least, I thought I was.
    I actually took my spectacles off, and looked to see if they were smeared or some-such. They weren't, but I cleaned them anyway.

    Let's try this again.

    14.5 Gr H-110. Otherwise, same setup. 6 rounds

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    This is starting to look a bit better. I reshot it, same load, different lube. 14.5gr H-110, 6 rounds

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    Okay, we're getting somewhere. I tried the last set I had loaded -

    15.0gr H-110, the same 358156, the same 50' rested (sort of). 6 rounds.

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    That's a 1 5/8" 6 shot group, with a new load, in a revolver I purchased 3 weeks ago.

    It appears the scuttlebutt was correct. H-110 DOES like the higher pressures, at least in this revolver. As the charge weight, and pressure, went up, the groups tightened. Considerably.

    Lyman Cast #4 shows a max of 15.7gr with this boolit. I think I'll load up some 15.2, 15.4, 15.6 and see how it does. I don't need a whole bunch of these loads, I'll probably load up a hundred or so when I settle on 'the' load, and that will last me a good while.

    Of course, Mrs Bookworm has that H&R 357 carbine....
    Last edited by Bookworm; 08-22-2017 at 12:23 PM. Reason: Charge weight clarification
    "Varium et mutabile semper femina." - Virgil
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  2. #2
    Boolit Master
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    I discovered the same thing in a .41 Magnum Blackhawk with 210 gr Sierras and h110s twin w296.
    Stand on it for little groups. Killed a buck too.

  3. #3
    Boolit Master

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    You may want to see if your .358" boolit will go through the cylinder throats from the front without having to beat it through. With magnum loads, boolits exit the cylinder at throat diameter. if you have to beat it through, the cylinder is acting like a 6 port sizing die. This does absolutely zilch for accuracy.
    Got a .22 .32 .357 .38 .40 .41 .44 .45 .480 or .500 S&W cylinder that needs throat reaming? 9mm, 10mm/40S&W, 45 ACP pistol barrel that won't "plunk" your handloads? Shoot me a PM! Also on Facebook: https://www.facebook.com/Cylinderhone-756429174391912/

  4. #4
    Boolit Master

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    Doug, I have a set of minus pin gauges. .358 slides into all 6, .359 won't go in any of them.
    I'll start sizing all the boolits for this revolver at 358.
    "Varium et mutabile semper femina." - Virgil
    Man, ain't it the truth....

  5. #5
    Boolit Master

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    Quote Originally Posted by Bookworm View Post
    Doug, I have a set of minus pin gauges. .358 slides into all 6, .359 won't go in any of them.
    I'll start sizing all the boolits for this revolver at 358.

    You are GOLD sir!!
    Got a .22 .32 .357 .38 .40 .41 .44 .45 .480 or .500 S&W cylinder that needs throat reaming? 9mm, 10mm/40S&W, 45 ACP pistol barrel that won't "plunk" your handloads? Shoot me a PM! Also on Facebook: https://www.facebook.com/Cylinderhone-756429174391912/

  6. #6
    Boolit Man
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    My 40 S&W did this with lee's 175 gr tc boolet and hs6. I was shooting it out of my high point carbine. Starting loads where just ok but as I loaded closer to max the groups tightened up a lot.

  7. #7
    Quote Originally Posted by DougGuy View Post
    You may want to see if your .358" boolit will go through the cylinder throats from the front without having to beat it through. With magnum loads, boolits exit the cylinder at throat diameter. if you have to beat it through, the cylinder is acting like a 6 port sizing die. This does absolutely zilch for accuracy.
    This is probably the reason he didn't get squibs running such light loads. My current data from Hodgdon shows to never load below 15. If he had .359 throats, 14 grains would have been a bad time.

  8. #8
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    15.7 grains of H-110 with the 358-156 has been the most accurate combination of that powder and boolit. It is book max, at least from Lyman's # 3 handbook, but it is the most accurate 357 magnum load I have found.
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  9. #9
    Boolit Master

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    OP here.

    I loaded a few each of the 15.2, 15.4, & 15.6 grain loads, and tried them. The 15.4 clocked ~1293fps from a 6.5" Blackhawk. Stan.Dev. was 18, Spread was 45fps.

    When I got to the 15.6g load, the group opened, and velocity didn't increase. I'll load a few at 15.5, from advice of respected board members, to try. If that load doesn't do any better than the 15.4, I'll stick with the lower charge weight (for a modicum of economy).
    "Varium et mutabile semper femina." - Virgil
    Man, ain't it the truth....

  10. #10
    Boolit Master
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    Quote Originally Posted by Bookworm View Post
    OP here.

    I loaded a few each of the 15.2, 15.4, & 15.6 grain loads, and tried them. The 15.4 clocked ~1293fps from a 6.5" Blackhawk. Stan.Dev. was 18, Spread was 45fps.

    When I got to the 15.6g load, the group opened, and velocity didn't increase. I'll load a few at 15.5, from advice of respected board members, to try. If that load doesn't do any better than the 15.4, I'll stick with the lower charge weight (for a modicum of economy).
    Did the groups improve at all?

    Sent from my SM-G900V using Tapatalk

  11. #11
    Boolit Master

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    Quote Originally Posted by aarolar View Post
    Did the groups improve at all?

    Sent from my SM-G900V using Tapatalk
    The groups for the 15.0g & 15.4g were very similar, with the 15.4 perhaps slightly better.
    The numbers (SD & ES) for the 15.4 were better than the lighter loads.

    Oddly enough, with the 15.6g the group opened, but the SD & ES numbers were slightly better than the 15.4g. However, the velocity stopped increasing.
    "Varium et mutabile semper femina." - Virgil
    Man, ain't it the truth....

  12. #12
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    Quote Originally Posted by Bookworm View Post
    The groups for the 15.0g & 15.4g were very similar, with the 15.4 perhaps slightly better.
    The numbers (SD & ES) for the 15.4 were better than the lighter loads.

    Oddly enough, with the 15.6g the group opened, but the SD & ES numbers were slightly better than the 15.4g. However, the velocity stopped increasing.
    Good to know for future reference, one day Ill get me an N frame and start working up some hot loads. I dont dare experiment in my K frames.

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  13. #13
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    Quote Originally Posted by rintinglen View Post
    15.7 grains of H-110 with the 358-156 has been the most accurate combination of that powder and boolit. It is book max, at least from Lyman's # 3 handbook, but it is the most accurate 357 magnum load I have found.
    I have an old load copied from somewhere that is labeled Blackhawk only that shows 15.5 gr and warns to use sr primers. Are you using sp primers safely? Thanks in advance.
    [The Montana Gianni] Front sight and squeeze

  14. #14
    Boolit Master
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    I use Winchester SP Magnum primers in these loads--just about the only cartridge I load that I do use Magnum primers in.

    I took my data from the Lyman # 3 Cast Bullet handbook, which was duplicated in an older copy of the Lyman pistol and Revolver Loadbook. My RCBS Cast Bullet No. 1 Manual lists a higher load for their similar 38-162 SWC GC, but I found going higher got me bigger groups.

    Having been taught to reload by an Old Lyman manual (#45, IIRC) and having never run into trouble following their recommendations, I trust Lyman publications.
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  15. #15
    Boolit Master

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    My Lyman Cast #3 lists 15.7 H-110 as max, showing 40K CUP pressure. It shows 11.4g as a start load (!).
    Cast #4 shows the same max - 15.7g, but starts at 15.0.

    I also use Small Pistol Magnum primers, opting for CCI 550, mostly because that's what I have.

    I loaded up some 15.5g to try, but saw no benefit over the 15.4g load, after shooting both. The velocity numbers were close enough to not matter.
    The deviation and spread was slightly better with the 15.5 load, but the groups were indistinguishable one from the other.

    I am settled on the 15.4g load for this revolver. I don't shoot a bunch of these rounds so I'll probably load up a couple hundred, and they will last for quite some years.

    Now I can start on a load for the H&R 357 single-shot. I have both 357 & 360DW brass for it.....
    "Varium et mutabile semper femina." - Virgil
    Man, ain't it the truth....

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check