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The Range
Ammo & Reloading
Playing around with a new 357 Mag load
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<blockquote data-quote="Dumpstick" data-source="post: 3019363" data-attributes="member: 41653"><p>Still chasing this load. Here's what I've done with this since last week.</p><p></p><p> I loaded some of these TL358-175PB up using AA#7. I'm thinking that the #9 may be too slow for what I want.</p><p> </p><p>I went with PMC brass, CCI #550 (SP Magnum) primers. Western Powder #6.0, and Lee #2 (pg208) agree on the charge weights - something like 8.2 - 9.3gr. I went with 2 loads - 8.5 and 9.0gr. I'm still looking for 1050-1100fps</p><p></p><p>I fired these on the 9th, from a 4" Ruger Security Six. 18 shots each. Some of the shots produces an error on the chrony, the 8.5g load is 14 shots.</p><p></p><p> Charge weight Speed Std Dev. Spread </p><p> 8.5gr 900 fps 16.6 49</p><p> 9.0gr 968 fps 18.0 63 </p><p></p><p>The numbers look good, it's a fairly efficient load. I've seen 90+ fps spreads on factory ammo, so I'm not too worried about the numbers I'm getting. I fired some factory Federal 125g JHP from a 6.5" Blackhawk (the same day), and got 70+ fps spread, along with ~1650fps muzzle velocity (!!!!)</p><p> Also, I don't think I'm a good enough shot, or that I'm shooting at enough distance to notice the difference. Both loads were easy shooting, but the Pachy grips on it tend to work very well for me. Brass fell out easily, no indication of pressure. Brass was clean, no soot.</p><p></p><p>Target for the 8.5g load. 25', standing, two hand hold, no support.</p><p>[ATTACH=full]104906[/ATTACH]</p><p></p><p>That's about a 1.5" dot in the center, the group is 4 3/4" x 4 1/4". The 9gr load was similar, but centered about 1.5" higher (!) on the target, even though it was traveling faster. I never shoot all that well over the chrony, I'm certain I can do better.</p><p></p><p> Note : That Ruger needs help. It was leading again - I looked down the barrel, and it looks like the rifling was chiseled in. I may have to fire-lap this thing to get it to quit leading.</p><p></p><p>Where am I at with this ? Well, I don't know.</p><p> I can use the 8.5g as a target shooting/casual load. However, I can shoot much more accurately (not to mention economically) with a wadcutter and 3 grains of something fast.</p><p> I can keep the 9.0g load as a field load. Certainly, 180 grains traveling at 950+ fps is a capable round. If I put it in the 6.5" Blackhawk, or the 6" GP-100, I will probably flirt with 1050 fps, my original goal. Although, I really don't go woods walking as much as I did 20 years ago.</p><p> I can try this with a gas check. The mold is a 4-cavity - 2 plain base/2 gas check. I can try some of these with a gas check, and put the fuel to it - make an almost-max round with the #9 powder. For that matter, I can fire it all the way up with some H110 !</p><p></p><p> When I purchased the mold, I wanted to use it in a .357 Handi-rifle that Mrs Dumpstick owns. It chambers 360DW brass easily, and I wanted to see what this 180g would do in there, gas-checked and lubed up. I think it would make a formidable deer/hog round, at 1500fps or so, easily a 100 yd rifle.</p></blockquote><p></p>
[QUOTE="Dumpstick, post: 3019363, member: 41653"] Still chasing this load. Here's what I've done with this since last week. I loaded some of these TL358-175PB up using AA#7. I'm thinking that the #9 may be too slow for what I want. I went with PMC brass, CCI #550 (SP Magnum) primers. Western Powder #6.0, and Lee #2 (pg208) agree on the charge weights - something like 8.2 - 9.3gr. I went with 2 loads - 8.5 and 9.0gr. I'm still looking for 1050-1100fps I fired these on the 9th, from a 4" Ruger Security Six. 18 shots each. Some of the shots produces an error on the chrony, the 8.5g load is 14 shots. Charge weight Speed Std Dev. Spread 8.5gr 900 fps 16.6 49 9.0gr 968 fps 18.0 63 The numbers look good, it's a fairly efficient load. I've seen 90+ fps spreads on factory ammo, so I'm not too worried about the numbers I'm getting. I fired some factory Federal 125g JHP from a 6.5" Blackhawk (the same day), and got 70+ fps spread, along with ~1650fps muzzle velocity (!!!!) Also, I don't think I'm a good enough shot, or that I'm shooting at enough distance to notice the difference. Both loads were easy shooting, but the Pachy grips on it tend to work very well for me. Brass fell out easily, no indication of pressure. Brass was clean, no soot. Target for the 8.5g load. 25', standing, two hand hold, no support. [ATTACH=full]104906[/ATTACH] That's about a 1.5" dot in the center, the group is 4 3/4" x 4 1/4". The 9gr load was similar, but centered about 1.5" higher (!) on the target, even though it was traveling faster. I never shoot all that well over the chrony, I'm certain I can do better. Note : That Ruger needs help. It was leading again - I looked down the barrel, and it looks like the rifling was chiseled in. I may have to fire-lap this thing to get it to quit leading. Where am I at with this ? Well, I don't know. I can use the 8.5g as a target shooting/casual load. However, I can shoot much more accurately (not to mention economically) with a wadcutter and 3 grains of something fast. I can keep the 9.0g load as a field load. Certainly, 180 grains traveling at 950+ fps is a capable round. If I put it in the 6.5" Blackhawk, or the 6" GP-100, I will probably flirt with 1050 fps, my original goal. Although, I really don't go woods walking as much as I did 20 years ago. I can try this with a gas check. The mold is a 4-cavity - 2 plain base/2 gas check. I can try some of these with a gas check, and put the fuel to it - make an almost-max round with the #9 powder. For that matter, I can fire it all the way up with some H110 ! When I purchased the mold, I wanted to use it in a .357 Handi-rifle that Mrs Dumpstick owns. It chambers 360DW brass easily, and I wanted to see what this 180g would do in there, gas-checked and lubed up. I think it would make a formidable deer/hog round, at 1500fps or so, easily a 100 yd rifle. [/QUOTE]
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