jeremy.b
Well-Known Member
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Absolute Hammer load data
- Thread starter RockyMtnMT
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Calvin45
Well-Known Member
I sometimes wonder if I just have a "fast barrel" on my plain Jane .270 Winchester. Cheap savage, 22 inch barrel, no trouble
At all hitting 3100 with hornady 140s and then I see numerous accounts of .270 wsm and .270 wby guys with 2-4 inches more barrel barely exceeding that by even 100 fps as in your accubond load…my gun a fluke?
oops, yes 3360
dok7mm
Well-Known Member
I've been unable to find AH Hammer Data for my Sherman 7 Max using the 140 and 155 absolutes.
I'm happy with running the 180 Berger Hybrids, but I have another barrel I'd like to set up with the absolutes. I also have a spare .264wm barrel for the 7max SwitchLug that I might use the 140s on.
Thought I'd check if anyone has any data on the above, before I call Hammers.
Thanks, David
I'm happy with running the 180 Berger Hybrids, but I have another barrel I'd like to set up with the absolutes. I also have a spare .264wm barrel for the 7max SwitchLug that I might use the 140s on.
Thought I'd check if anyone has any data on the above, before I call Hammers.
Thanks, David
Dok7,
Not a lot of us shooting the Sherman Max yet. For reference, look at the Absolute Hammer load data file. You can use 7 SAUM data or WSM for start loads and go up til you find pressure. Please post final results and I'll post your data. Thanks!
GL
dok7mm
Well-Known Member
Thanks, I've been checking saum data this morning. It has been 100+ degrees here in west Texas practically every day since May, so I'm not in a big hurry. I need to form some more brass and get barrels broke in,for a start.
dok7mm
Well-Known Member
You're correct! Steve mentioned that last fall.
If it were me I'd look at the 154 absolute dead blow and no expect the fps gain and run them at about 32-3250. I'd switch but I'm running the 169 hammer hunters at 3100 out of mine.
dok7mm
Well-Known Member
I've already worked up a load with 155 @ 3232 with RL-23 in 7 max. I plan on trying some faster powders with 155, but if it doesn't work I'll drop back to 140s.
To my knowledge, no one has worked up a load for the 7 Max using AHs, so I'll play around with it just to see.
To my knowledge, no one has worked up a load for the 7 Max using AHs, so I'll play around with it just to see.
JakeC
Well-Known Member
Just shot my first hammers today, here's some data for you 7saum users that's NOT the 155. Just wanted to widen the research I guess. Pretty sure I found pressure with a lot less powder than I expected, but at the velocity I expected. I'm looking for advice on that after the data below. This is long because Saum data suffers in general and Alliant offers absolutely nothing of value. I also wanted to compare crimp levels with the same charges.
Short version, I got an easy 300 fps gain over normal 140g data.
Gun: savage 10fcp short action small shank, 24" xcaliber/crown ridge sendero prefit barrel, stainless 5r. long throat. Shot 168 ABLR at 2950 (hot) and 180 ELDM at 2730 (cool) in the same conditions.
Climate: The worst. 4500 ft. 100 degrees ambient temp, 30.03 in.. Wind. I let the gun be hot and left the ammo just in the shade, not cooled or sheltered. I wanted the baseline to be safe in the most extreme possible situation.
Cartridge:
7 saum gunwerks brass by ADG, possibly different than regular adg. 221g bare case weight, unknown h20 volume. (with very slow pour and shaking 64 grains RL16 fills to the case neck. Seems like snug brass)
2x fired, annealed
.002-3 bump
.0035 neck tension
Reloder 16
coal 2.876
140 absolute hammers seated middle of first groove, last drive band at neck base.
jump = .135"
fed 210M primers
Crimped as described below, lee FCD
In general it looks like the FCD offers a predictable appreciation on dwell time. I'm new to crimping and it's actually a wsm die so some variations are expected. I suspect the light setting was inconsistent.
No crimp: .99" group @ 100 with one chipped ogive, scraped it myself
(#)
1-59.5g=3306
4-60.0g=3354
7-60.5g=3384
10-61.0g=3463 (no primer/lift/ejec but gun felt different, cranky)
1/8 turn crimp: 1.3" group with one dented meplat, I dropped it.
2-59.5=3298
5-50.0=3390
8-60.5=3400
11-61.0=3402 (gassy dirty case head, MV drop. All done!)
1/4 turn crimp .55" @100
3-59.5=3319
6-60.0=3375
9-60.5=3440 (Tiny, tiny bolt lift. Perceptible extra cratering. light but normal flattening. No shine, no ejector.)
After the 60 g charges I thought I might see 3500 because I expected 63 to be safe, but no dice. I met my goal though, 3400 with a fully seated bullet. Someone might grow this by using thinner brass and seating longer but I think I'm done. I'm overlapping into hot 28 Nosler data in a short action with a small shank and a barrel nut and temp stable powder. I hoped to improve more on 280AI data but I'm happy. I'm matching wsm data.
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I can take this part to another thread, or folks can pm me.
1. Almost all the shells were slightly grimy on the back end with some wispy oily crud. I've never used RL16 before. I've also never really scotch padded or solvent cleaned my case walls before, I did both. Did I make it stick up in the chamber allowing a little gas out of the primer pocket because it wasn't slammed back? Did I screw up my primer pockets by uniforming them? 2. Few of the primers showed even a normal amount of deformation and none of the brass had the slightest bit of shine. I had one odd bolt lift that was within the normal range for this gun and one insrance of extra cratering (savage craters everything a little). I get the same with factory ammo when it has its creedmoor barrel on.
3. combing the 2 above was I even at pressure? Was I at pressure from the start? seriously doubt that. Speed was where I expected to hit it based on math but powder was 2g off my most conservative calculation. I have 15 bullets to pull now, ha.
Short version, I got an easy 300 fps gain over normal 140g data.
Gun: savage 10fcp short action small shank, 24" xcaliber/crown ridge sendero prefit barrel, stainless 5r. long throat. Shot 168 ABLR at 2950 (hot) and 180 ELDM at 2730 (cool) in the same conditions.
Climate: The worst. 4500 ft. 100 degrees ambient temp, 30.03 in.. Wind. I let the gun be hot and left the ammo just in the shade, not cooled or sheltered. I wanted the baseline to be safe in the most extreme possible situation.
Cartridge:
7 saum gunwerks brass by ADG, possibly different than regular adg. 221g bare case weight, unknown h20 volume. (with very slow pour and shaking 64 grains RL16 fills to the case neck. Seems like snug brass)
2x fired, annealed
.002-3 bump
.0035 neck tension
Reloder 16
coal 2.876
140 absolute hammers seated middle of first groove, last drive band at neck base.
jump = .135"
fed 210M primers
Crimped as described below, lee FCD
In general it looks like the FCD offers a predictable appreciation on dwell time. I'm new to crimping and it's actually a wsm die so some variations are expected. I suspect the light setting was inconsistent.
No crimp: .99" group @ 100 with one chipped ogive, scraped it myself
(#)
1-59.5g=3306
4-60.0g=3354
7-60.5g=3384
10-61.0g=3463 (no primer/lift/ejec but gun felt different, cranky)
1/8 turn crimp: 1.3" group with one dented meplat, I dropped it.
2-59.5=3298
5-50.0=3390
8-60.5=3400
11-61.0=3402 (gassy dirty case head, MV drop. All done!)
1/4 turn crimp .55" @100
3-59.5=3319
6-60.0=3375
9-60.5=3440 (Tiny, tiny bolt lift. Perceptible extra cratering. light but normal flattening. No shine, no ejector.)
After the 60 g charges I thought I might see 3500 because I expected 63 to be safe, but no dice. I met my goal though, 3400 with a fully seated bullet. Someone might grow this by using thinner brass and seating longer but I think I'm done. I'm overlapping into hot 28 Nosler data in a short action with a small shank and a barrel nut and temp stable powder. I hoped to improve more on 280AI data but I'm happy. I'm matching wsm data.
----------------------------------------------------------------------------------------------------------
I can take this part to another thread, or folks can pm me.
1. Almost all the shells were slightly grimy on the back end with some wispy oily crud. I've never used RL16 before. I've also never really scotch padded or solvent cleaned my case walls before, I did both. Did I make it stick up in the chamber allowing a little gas out of the primer pocket because it wasn't slammed back? Did I screw up my primer pockets by uniforming them? 2. Few of the primers showed even a normal amount of deformation and none of the brass had the slightest bit of shine. I had one odd bolt lift that was within the normal range for this gun and one insrance of extra cratering (savage craters everything a little). I get the same with factory ammo when it has its creedmoor barrel on.
3. combing the 2 above was I even at pressure? Was I at pressure from the start? seriously doubt that. Speed was where I expected to hit it based on math but powder was 2g off my most conservative calculation. I have 15 bullets to pull now, ha.
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What was your bolt lift like and did you see any hint of an ejector swipe?
JakeC
Well-Known Member
No ejector imprint at any point, bolt lift was just barely enough to notice a change. Only visible change was the sight cratering.
