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Posted: 9/9/2018 4:40:04 PM EDT
[#1]
I was sizing them down to .260, and had to reduce my H4350 charge 1.3gr to achieve the same velocity. Not sure if that helps.
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Posted: 9/9/2018 4:54:58 PM EDT
[#2]
Quote HistoryQuoted:
I was sizing them down to .260, and had to reduce my H4350 charge 1.3gr to achieve the same velocity. Not sure if that helps. |
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Posted: 9/9/2018 5:11:14 PM EDT
[#3]
I guess I should add...I had previously been using Lapua brass.
So 45gr of H4350 in Lapua cases to 43.7gr in necked down LC brass. |
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Posted: 9/9/2018 6:16:40 PM EDT
[#4]
2.0 whole grains is the rule of thumb.
What load are you currently using and what brass? Winchester brand .308 is the lightest and will allow the highest safe powder charges. My maximum charges in Lake City/IMI brass are: 168 grain match bullets Winchester standard large rifle primers. 2.800" OAL. 40.5 grains of IMR-4895 41.5 grains of IMR-4064 40.0 grains of H4895 43.0 grains of WW-748 40.5 grains of AA-2460 41.5 to 42.0 grains of VihtaVuori N150 41.5 to 42.0 grains of Varget 41.5 to 42.0 grains of RE-15 I usually get my best accuracy around .5 grain under these loads. |
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Posted: 9/9/2018 10:46:50 PM EDT
[#5]
2.0 grs is the rule of thumb as mentioned above.
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Posted: 9/10/2018 12:07:09 PM EDT
[#6]
Quoted:
So to get roughly the same load in commercial ammo, how much do you reduce your nato/mil cases? Hence with hand loading, you can control the Ogive COAL of the ammo to have less jump to lands for each rig at hand, and by working up your loads from the powder start points to find both nods that shoots the best, you can come up with a lower speed load that gets the bullet sleeping quickly for shorter ranges, and a faster load that may take longer yardage for the bullet to sleep, but better for less wind doping isntead. Hence 308, and the standard load for say a 150gr bullet is 2600fps, but may not tack drive in a rig instead. So slower node for short range, faster load for longer shots, that both gets the rig to take drive, will put the shot where your aiming isntead. So find the nodes, and then you can build the needed charts from there for your yardage adjustments isntead. |
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Posted: 9/10/2018 12:46:53 PM EDT
[#7]
Quote HistoryQuoted: Why in the first place? Hence with hand loading, you can control the Ogive COAL of the ammo to have less jump to lands for each rig at hand, and by working up your loads from the powder start points to find both nods that shoots the best, you can come up with a lower speed load that gets the bullet sleeping quickly for shorter ranges, and a faster load that may take longer yardage for the bullet to sleep, but better for less wind doping isntead. Hence 308, and the standard load for say a 150gr bullet is 2600fps, but may not tack drive in a rig instead. So slower node for short range, faster load for longer shots, that both gets the rig to take drive, will put the shot where your aiming isntead. So find the nodes, and then you can build the needed charts from there for your yardage adjustments isntead. |
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Posted: 9/10/2018 12:53:46 PM EDT
[#8]
Quote HistoryQuoted: Why in the first place? Hence with hand loading, you can control the Ogive COAL of the ammo to have less jump to lands for each rig at hand, and by working up your loads from the powder start points to find both nods that shoots the best, you can come up with a lower speed load that gets the bullet sleeping quickly for shorter ranges, and a faster load that may take longer yardage for the bullet to sleep, but better for less wind doping isntead. Hence 308, and the standard load for say a 150gr bullet is 2600fps, but may not tack drive in a rig instead. So slower node for short range, faster load for longer shots, that both gets the rig to take drive, will put the shot where your aiming isntead. So find the nodes, and then you can build the needed charts from there for your yardage adjustments isntead. Current powder is shooters world tactical rifle. I was going to use 42 grains with a 150gr bullet |
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Posted: 9/10/2018 12:54:27 PM EDT
[#9]
Quote HistoryQuoted: The way I read it, he was using standard commercial brass, and just got some LC/Mil brass. He's really about the differences in the internal capacities. |
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Posted: 9/10/2018 3:36:58 PM EDT
[#10]
Quote HistoryQuoted:
Thw load data i have is with commercial brass Quote HistoryQuoted:
Quoted: The way I read it, he was using standard commercial brass, and just got some LC/Mil brass. He's really about the differences in the internal capacities. This reduces the internal capacity of the case and increases pressure. Not a problem in many uses but a near max (or max) load developed using commercial cases can be over max in a thicker and heavier MIL case. |
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Posted: 9/10/2018 11:18:58 PM EDT
[#11]
When I shot HP with an M1A, I used any brass I could get my mitts on for practice.
For the longest time I standardized on light Winchester brass (say, 155 grains - don't remember) and used that as my baseline for loading. Needless to say, weigh different headstamps. They were all over the map. I used a 7:1 ratio for case weight differences to powder differences. If another batch of cases weighed, say, 170grains, I reduced my powder charges by 2 grains. |
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