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Max Online: 16728 @ 03/25/12 08:51 AM
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#6624919 - 01/09/17 08:53 PM coal vs powder charge
Matt Hejl Online   content
Bird Dog

Registered: 05/17/11
Posts: 321
When trying to find a certain load that works best with a specific rifle, how do you work your loads to find the most accurate considering the charge weight and the length of cartridge both factor in. Which do you guys start tweaking first?

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#6624922 - 01/09/17 08:55 PM Re: coal vs powder charge [Re: Matt Hejl]
dee Online   content
Extreme Tracker

Registered: 04/10/10
Posts: 4948
Loc: Red River way
Charge first then oal within perspective. If a max load care must be taken enlongating coal for pressure spikes.
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#6624937 - 01/09/17 08:59 PM Re: coal vs powder charge [Re: Matt Hejl]
ChadTRG42 Offline
THF Celebrity

Registered: 09/16/09
Posts: 10620
Loc: Lewisville, TX
Powder first, always. Most of the time I can tune the load with the powder if you seat the bullet correctly to the lands. If the bullet is a tangent ogive, then seating depth will not matter much, as they as not seating depth sensitive. The newer, more aggressive bullets coming out, some have a very aggressive secant ogive, and will need to be seated close to the lands to shoot well. If you are feeding from a short magazine, then these bullets can be difficult to tune with a long jump, no matter the powder charge. So, it really depends on what type of bullet you run, as to what method works best.
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#6625017 - 01/09/17 09:34 PM Re: coal vs powder charge [Re: Matt Hejl]
Matt Hejl Online   content
Bird Dog

Registered: 05/17/11
Posts: 321
Do you guys just start around .02 off lands?

I am shooting a pro Hunter bullet.

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#6625032 - 01/09/17 09:40 PM Re: coal vs powder charge [Re: Matt Hejl]
RHutch Offline
Bird Dog

Registered: 05/25/13
Posts: 366
Loc: Frisco
I start at the lands with the long bullets. Only one way to go from there for tuning.

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#6625154 - 01/09/17 10:21 PM Re: coal vs powder charge [Re: Matt Hejl]
jeffbird Online   content


Registered: 03/09/09
Posts: 2068
Originally Posted By: Matt Hejl
Do you guys just start around .02 off lands?

I am shooting a pro Hunter bullet.


Only test one variable at a time.

I start with bullets 0.010" off the lands and then leave them alone and test increasing charges of powder.

Except for the big boomers, I start 3.0 grains below max, load 1 round moving up 0.3 gr at a time, just to check speed which is an indicator of pressure and also watch for signs of excessive pressure on the brass and bolt lift.

Then with 2.0 grains from max, move up 0.2 gr for three rounds each the last two grains up to max.

Test at least at 200 yards and good loads will be apparent. 300 makes it even more obvious.

The Pro Hunters have a tangent ogive and usually are not sensitive to seating depth.

What round are you loading?

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#6625160 - 01/09/17 10:22 PM Re: coal vs powder charge [Re: Matt Hejl]
kmon1 Offline
junior

Registered: 09/27/06
Posts: 21397
Loc: Texas
I find the lands then check if seated to that depth will work through the magazine, if not shorten them for proper function.

With the GK bullet .02 off the lands should work well that has an ogive that is not that depth sensitive and can usually get very good accuracy with adjusting the powder charge
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#6625182 - 01/09/17 10:26 PM Re: coal vs powder charge [Re: Matt Hejl]
Matt Hejl Online   content
Bird Dog

Registered: 05/17/11
Posts: 321
300 blackout supersonic and 243.

Both in single shot rifles.

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