7mm sherman max

StanleyActual8541

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Jul 9, 2021
Messages
403
Location
N. Idaho
Oh man! Got my Sherman Max brass and dies in the other day. It’s a sexy looking boolit! Thanks Rich! @elkaholic

cant wait to get this rifle built and get to shooting. Once the 7SS kit comes in I’ll have the kiddos rifle to build too.

3CFD335C-A0B8-408A-9618-B1D3B6A5BB5E.jpeg
 

Bghunter338

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Jun 1, 2019
Messages
558
Location
Wilder, Idaho
Oh man! Got my Sherman Max brass and dies in the other day. It’s a sexy looking boolit! Thanks Rich! @elkaholic

cant wait to get this rifle built and get to shooting. Once the 7SS kit comes in I’ll have the kiddos rifle to build too.

View attachment 292183
Heck with the Ti-pro 3 break I put on it my kids can shoot it. There's literally no recoil.
 

codyadams

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Joined
Jan 7, 2015
Messages
3,658
Location
Southwest Wyoming
Have been playing with my wife's 7 max, so far have shot the 170 PVA cayugas, the 177 hammers, and the 175 eld-x. All using n565. The cayugas are an interesting bullet, the band up front measures .280, so between bore diameter and rifling diameter, and the bearing surface is very short, shorter than the neck of the max. Below is how I have these seated, they are .125" off the lands, OAL of 3.140", the bearing surface at the boat tail is above the neck shoulder junction, and the front bearing surface is at the case mouth, so all the bearing surface is in the case neck, but still above the neck/shoulder junction.

In this 20" barrel, pressure signs are showing up around 2950 fps. With the 175 eld-x's, they showed up at about 2870 fps, and with the 177 hammers, about 2900 fps.

20210818_232438.jpg
 

highdrum

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Nov 30, 2008
Messages
2,767
Location
Montana
Have been playing with my wife's 7 max, so far have shot the 170 PVA cayugas, the 177 hammers, and the 175 eld-x. All using n565. The cayugas are an interesting bullet, the band up front measures .280, so between bore diameter and rifling diameter, and the bearing surface is very short, shorter than the neck of the max. Below is how I have these seated, they are .125" off the lands, OAL of 3.140", the bearing surface at the boat tail is above the neck shoulder junction, and the front bearing surface is at the case mouth, so all the bearing surface is in the case neck, but still above the neck/shoulder junction.

In this 20" barrel, pressure signs are showing up around 2950 fps. With the 175 eld-x's, they showed up at about 2870 fps, and with the 177 hammers, about 2900 fps.

View attachment 292254
The Cayuga shoot excellent, extremely consistent, not picky at all about seating depth. Put em through bone and they'll do alright. Put em in vitals and they don't expand that well. I shot a lot of critters with em last season.
 

codyadams

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Jan 7, 2015
Messages
3,658
Location
Southwest Wyoming
The Cayuga shoot excellent, extremely consistent, not picky at all about seating depth. Put em through bone and they'll do alright. Put em in vitals and they don't expand that well. I shot a lot of critters with em last season.
We have shot two pronghorn and an elk with them so far, and they have done good to this point, but the lowest velocity at impact so far has been a 460 yard pronghorn at 2800 fps, so will be interesting to see. The two pronghorn hit nothing but light rib bones, but still bone.
 

highdrum

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Joined
Nov 30, 2008
Messages
2,767
Location
Montana
We have shot two pronghorn and an elk with them so far, and they have done good to this point, but the lowest velocity at impact so far has been a 460 yard pronghorn at 2800 fps, so will be interesting to see. The two pronghorn hit nothing but light rib bones, but still bone.
I had good results on 2 antelope, 1 large bodied mule deer buck in rut, put it high shoulder and it zapped him, when we get to thr buck, he was paralyzed from spinal shock but still very much alive. The bull elk at 575y, the first 3 went through quartered away vitals like nothing happened, so much so I thought I was missing completely. The 4th shot I put it high shoulder and it crumpled the bull. I recovered the high sholder, hardly any expansion. These were all the 123gr 6.5mm version.
 

JTH

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Joined
Dec 15, 2012
Messages
136
Location
Wisconsin
If it doesn't speed up when its broke in, call me.
Shot some more today after thoroughly scrubbing the barrel. I ran some 131 grain hammer hunters through it, using H4831sc, building up to 71.3 grains, where I hit pressure at 3,541 FPS. More work to do on that load but it looks promising.

Cleaned the barrel again, and took another stab at the 195 EOL with N570. Worked my way up to 69.0 grains where the bolt lift stiffened a little and had a very faint ejector mark. At 68.5 grains it produced a nice group running 2,925 FPS.

Picture is from the 195 EOL’s. It’s only a 3 round group, but SD of 4.7 seems like I’m on the right path.

757A4664-1A7D-4C55-8141-551C4AFF49BF.jpeg
 

JTH

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Joined
Dec 15, 2012
Messages
136
Location
Wisconsin
Worked up another 2 loads for the 7 Max today.

131 Hammer Hunter load ended up over 3500 FPS and sub 1/4 moa.

180 VLD Berger load ended up just under 3,000 FPS and sub 1/2 MOA

195 EOL Berger load (above) was a little under 0.3 MOA

More details on the Sherman Wildcats load data postC3387348-CD68-4E1C-9117-C52C73D945AC.jpeg105BD453-9D25-4B9B-BC8C-454A54457DFA.jpeg
 

GregH118

Member
Joined
Jan 5, 2019
Messages
21
Location
Utah
can someone help me with this problem 6.5 max Berger 156 .290 neck bushing hornady micro seater bought from Rich
 

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