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PostPosted: Mon Apr 02, 2018 9:13 pm 
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Whats a max load in a 308 with a 180-185gr RN flat base bullet with trailboss ( from what iv seen its pretty much to the sholder )? Im about to reload som hand cast bullets with it . also whay kind of report do you get without a supresor? as im not alowed one in my country. And should i use a crimp?
Thanks heaps for your replies in advanced


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PostPosted: Tue Apr 03, 2018 8:20 am 
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I can check when I get home, but I think I'm around 10.4gr of Trailboss w/ a 180RN. Light crimp. Report w/o a suppressor, through a 20" bbl, isn't too bad.

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PostPosted: Wed Apr 04, 2018 5:21 pm 
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T-Rex wrote:
I can check when I get home, but I think I'm around 10.4gr of Trailboss w/ a 180RN. Light crimp. Report w/o a suppressor, through a 20" bbl, isn't too bad.


Awsome i have heard it can fit almost 15grains to the sholder but idk any help will be apreciated thanks . i am actually running it through a 20in heavy :D


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PostPosted: Wed Apr 04, 2018 7:40 pm 
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Double-checked, it's 10.0gr Trailboss for 180g RN Sierra 2170's

If you want to know how much powder fits in a case, go here and get case capacity. Then, divide that number by 15.43236 (grains in a gram or = cc). Then, go here and get the VMD for your powder. Divide this # into your last number. This will be the grains of powder that fit in your case.

308Win Case Capacity = 56gr
56/15.43236 = 3.62873857271
3.62873857271/0.2172 (Trailboss VMD) = 16.7gr to case mouth

You can also take your bullet length, add it to your case length, subtract your COAL and use this with Pi*r^2 (d=bullet dia) to subtract the portion of bullet seated in case from your original case capacity.

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PostPosted: Mon Apr 09, 2018 10:06 pm 
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Ok so iv mesured my intendad projectile ( lee 185gr .312 sized to .309) to the lands how far do i back it off ?


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PostPosted: Tue Apr 10, 2018 7:49 am 
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That is solely up to you and your rifle.
I'd start with a small jump, maybe .010" and work up some loads, for velocity.
Once you have your desired load, go back and play with seating depth.
I'd shoot these over the chrono as well to make sure you're staying w/in SS velocity ranges.

The load I shared is using Jacketed projectiles.
Lead bullets typically require LESS powder than jacketed.

Have a cleaning rod handy and always verify a clear bore, in the event of a squib (stuck) round.

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PostPosted: Tue Apr 10, 2018 11:36 pm 
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Wasnt nesaserily planing on staying subsonc but will be doing that as well . how fast do you recon i could push this bullet with a full load of trailboss and mag primers ?


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PostPosted: Wed Apr 11, 2018 8:29 am 
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W/o opening QuickLoad, I couldn't really say. When developing my own loads, I never went too far above subsonic. When working for subsonic, it's a reverse of normal loading. You start higher so as not to get bullets stuck in the bore and work down.

Mag primers really don't give that much of a velocity increase, especially w/ small loads. They're more for making sure the large powder charges, found in magnum cases, are reliably lit.

Depending on your goal velocity, you might want to try a few powders. Trailboss was really developed for slower rounds and might not get you where you want. H110, 4227 , W296, A1680, N120, are all good places to look.

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PostPosted: Thu Apr 19, 2018 4:12 pm 
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Bear Foot Bowhunter wrote:
Whats a max load in a 308 with a 180-185gr RN flat base bullet with trailboss ( from what iv seen its pretty much to the sholder )? Im about to reload som hand cast bullets with it . also whay kind of report do you get without a supresor? as im not alowed one in my country. And should i use a crimp?
Thanks heaps for your replies in advanced


No crimp required if your neck tension is proper. TB max loads (for modern cartridges like 308Win) is case filled to the bottom of your bullet. Report will be relatively mild as this will still be a low pressure (and low velocity) load compared to standard 308Win loads.

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