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Thread: 350 Rem Mag cooking and shooting good

  1. #1

    Default 350 Rem Mag cooking and shooting good

    Alright, 1 1/2" group but now this thing is cooking for a 20" barrel and a short action and a 225gr bullet using 60.3grs IMR4320 and bullet extracted easy and no over pressure signs.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  2. #2

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    Here are the Chrono graph readings in a better formate.

    First shot


    Second shot


    Third shot


    Average shot
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  3. #3

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    Extreme spread


    Standard deviation


    Case using 60.3grs IMR4320
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  4. #4
    Member RMiller's Avatar
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    Default

    Did you bend your chrony again?






    Just kidding, thanks for sharing.
    "You have given out too much reputation in the last 24 hours, try again later".

  5. #5

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    Know, not this time. I even shot 60grs of WW748 and it was 2624fps and last time averaged 2626fps so the chrony is working like it should.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  6. #6
    Member Float Pilot's Avatar
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    Beartooth:

    Have you tried any RL-15? It was not accurate in mine, (but then again nothing is) with 61 grains of RL-15 and a mag primer for a 225 grain slug. Not much pressure signs either. It should give you around the velocity you are seeing with 4320. Below is how it falls in place on the burn rate chart.

    I need to head back out to the shop and see how the firberglass fill is hardening,,, or not...


    117. Varget (Hodgdon)118. 5000 (Vectan)119. AR2208 (ADI)120. 4064 (IMR)121. 4064 XMR (Accurate)122. 2520 (Accurate)123. 4320 (IMR)124. N203 (Norma)125. N140 (Vihtavuori)126. N540 (Vihtavuori)127. 2700 (Accurate)128. Big Game (Ramshot)129. Reloader 15 (Alliant)130. H380 (Hodgdon)131. 760 (Winchester)132. Brig 4351 (Scot)133. H414 (Hodgdon)134. N150 (Vihtavuori)135. N550 (Vihtavuori)136. 4350 XMR (Accurate)137. 4350 (IMR)
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

  7. #7

    Default

    Quote Originally Posted by Float Pilot View Post
    Beartooth:

    Have you tried any RL-15? It was not accurate in mine, (but then again nothing is) with 61 grains of RL-15 and a mag primer for a 225 grain slug. Not much pressure signs either. It should give you around the velocity you are seeing with 4320. Below is how it falls in place on the burn rate chart.

    I need to head back out to the shop and see how the firberglass fill is hardening,,, or not...


    117. Varget (Hodgdon)118. 5000 (Vectan)119. AR2208 (ADI)120. 4064 (IMR)121. 4064 XMR (Accurate)122. 2520 (Accurate)123. 4320 (IMR)124. N203 (Norma)125. N140 (Vihtavuori)126. N540 (Vihtavuori)127. 2700 (Accurate)128. Big Game (Ramshot)129. Reloader 15 (Alliant)130. H380 (Hodgdon)131. 760 (Winchester)132. Brig 4351 (Scot)133. H414 (Hodgdon)134. N150 (Vihtavuori)135. N550 (Vihtavuori)136. 4350 XMR (Accurate)137. 4350 (IMR)
    FlotPilot, I used the CCI 250 mag primer this time and as you experienced I did not have pressure signs at these velocities. When I used Fed 210 Standard large rifle I was under this load by as much as 60fps using the same charge and not as accurate with the standard primer. I have not tried RL-15 because I only have RL-19, 22 and 25 on hand of Alliant powder.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  8. #8

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    Tomorrow, I will be testing 60.5grs with three different seating depths firing groups of three. Seating depths will be 2785.5", 2800" and 2816.5". It will be around 69 degrees with only a 10mph wind coming from 6 o'clock (hitting me in the back as I shoot). Since I had know pressure signs at 60.3grs I am going to try 60.5grs and the above seating depths to compare velocities and accuracy.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  9. #9
    Member Float Pilot's Avatar
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    I forgot,
    Are you shooting a Remington or a Ruger?

    I will try some of your loads in my slightly updated Ruger on Sunday.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

  10. #10
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    Default 350 rem mag

    I have an 18in barrell for my T/C encore, amongst others. I shoot 225gr barnes triple shock at 2600fps. Last year I killed a 300lbs Russian boar at 300yds. It dropped like a bad habit. I bought it for close range elk here in Western Wa., but it worked just fine at longer distance.

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