7 SAUM load data

chutinlead

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Jan 2, 2020
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101
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Wyoming
Just found this and am putting together a 7 SAUM on a tikka LA so COAL isn't an issue. Do any of you run the heavies like the berger EOL 195gr in ADG brass? I would like to run RL23, but I do have a little 4831SC I could use too. Looking at lengths I should be around a 3.150" COAL with that bullet.
 

Longtine88

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Nov 22, 2020
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278
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North Texas
Just found this and am putting together a 7 SAUM on a tikka LA so COAL isn't an issue. Do any of you run the heavies like the berger EOL 195gr in ADG brass? I would like to run RL23, but I do have a little 4831SC I could use too. Looking at lengths I should be around a 3.150" COAL with that bullet.
Mine would not stabilize them very well in my lower altitude. But I did get an COAL for them in mine and it touches lands at 3.134”.
 

chutinlead

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Jan 2, 2020
Messages
101
Location
Wyoming
Mine would not stabilize them very well in my lower altitude. But I did get an COAL for them in mine and it touches lands at 3.134”.
I went with a 1-8 Twist barrel and I live and hunt around 4500ft here in WY. Probably take this on an Elk hunt if I draw up above 8000 so hopefully it stabilizes. Was that a standard reamer?
 

naja302

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Jun 28, 2013
Messages
122
I’m gonna build a heavy gun on a medium action tag is something like 3.2” OAL.

what free bore do I need to allow me to seat Bullets this long? I’m thinking hornady or Berger 180’s

I have several on short actions and don’t get anywhere near the velocities listed on this thread
 

chutinlead

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Joined
Jan 2, 2020
Messages
101
Location
Wyoming
I’m gonna build a heavy gun on a medium action tag is something like 3.2” OAL.

what free bore do I need to allow me to seat Bullets this long? I’m thinking hornady or Berger 180’s

I have several on short actions and don’t get anywhere near the velocities listed on this thread
I was told to make up dummy rounds and tell the gunsmith how much freebore I wanted.
 

ridgeline300

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Feb 19, 2020
Messages
75
Location
Southern Idaho
I’m gonna build a heavy gun on a medium action tag is something like 3.2” OAL.

what free bore do I need to allow me to seat Bullets this long? I’m thinking hornady or Berger 180’s

I have several on short actions and don’t get anywhere near the velocities listed on this thread
There is info all over the internet about this... I think my freebore is .21 in my long action, most guys do .180. The .180 would put the boat tail right at the neck/shoulder junction where you want it and still leave room in the mag to chase the lands.

this is what I understand and would recommend but others may jump in.
 

ridgeline300

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Feb 19, 2020
Messages
75
Location
Southern Idaho
Circling back to this one... think i finally found what the gun likes. The 2 groups #10 and #11 are with the 184 hybrid. The single group #2 is the 175. The ES is so low on the 184 and it seems forgiving in that node so i am going to run that for a while. Not quite the speed i was hoping for but I’ll take that consistency. 22” barrel
 

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D$tring

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May 13, 2020
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59
Location
Idaho
Circling back to this one... think i finally found what the gun likes. The 2 groups #10 and #11 are with the 184 hybrid. The single group #2 is the 175. The ES is so low on the 184 and it seems forgiving in that node so i am going to run that for a while. Not quite the speed i was hoping for but I’ll take that consistency. 22” barrel
That looks pretty dang good to me! I love forgiving nodes. Do you have enough rounds through your barrel that it has leveled off? Or is it still gaining some speed? 2800ish isn’t bad for that heavy of a bullet. 2900+ was what I am hoping for with mine but for groups like that, with a tight ES/SD, a loss of 100fps is totally worth it.
 

ridgeline300

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Feb 19, 2020
Messages
75
Location
Southern Idaho
That looks pretty dang good to me! I love forgiving nodes. Do you have enough rounds through your barrel that it has leveled off? Or is it still gaining some speed? 2800ish isn’t bad for that heavy of a bullet. 2900+ was what I am hoping for with mine but for groups like that, with a tight ES/SD, a loss of 100fps is totally worth it.
I have about 100 rounds through the barrel so I think it has leveled out. This barrel only sped up maybe 30 FPS so maybe it will still increase but seems like it usually plains out after 100. I could maybe squeeze another 50 FPS out of it but it would be towards the top end of pressure. Even though I love extra speed, I think this will do!
 

PowellSixO

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Mar 19, 2013
Messages
618
Location
Arizona
I have about 100 rounds through the barrel so I think it has leveled out. This barrel only sped up maybe 30 FPS so maybe it will still increase but seems like it usually plains out after 100. I could maybe squeeze another 50 FPS out of it but it would be towards the top end of pressure. Even though I love extra speed, I think this will do!
I’ll take accuracy over speed any day.
 

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