QuickLoad QL - need load for 338 Lap

[tridiumk]

Hi guys, having a Mac, QL wont work on it.

Can someone please run a load development for me for my Ladder testing this weekend.

Gun - DTA SRS-A1
Barrel - 26 inch
powder - VV N570
Proj - Berger 300 gr Elite Hunter
BC G1 - 0.818
BC G7 - 0.419

not sure what else is needed, i'm not sure of the H2O capacity of the case...

Thanks !

 

[jdonovan]

Hi guys, having a Mac, QL wont work on it.

Fusion, or parallels.

Works OK in Wine, but there are some minor UI issues.


You really don't need QL to get your starting ladders... I'd start with the published data from Lapua for the VV570 powder

Products - Lapua

looks like a range of 80-91gr's

 

[lte82]

Let me know how the ladders go with N570. I've got 5 pounds of it but haven't gotten around to trying it out. N570 in QL produces great velocities by the way.

 

[jfields]

QL is not very accurate without your OWN H2O capacity info. That being said, work up to ~94 grains and you should be OK.

-J

 

[tridiumk]

Never want to run parallels, I hate anything Microsoft! Lol

Copy that re the loads. I'll work up to 95 but will be checking for pressure carefully. I'll post ladders after for you..


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[bigedp51]

Quickload provides software generated guesstimates and to be accurate you need to fill in case capacity, bullet seating depth, etc and one more very important item. A chronograph is needed and you have to change the powder burn rate until Quickload velocities match your chronograph velocities. Its not the end all to be all software that some people think it is, it fun to play with, "BUT" in the end comparing reloading data from several manuals will give you better data.

Below at the default setting of 108.00 grains of H2O, now compare this to a manual.

 

[Kirkd]

Yeah, i have Quickload and it would be dangerous to plug some numbers in for you. I use it to compare powders and to look at the guestimates, but I still work up the load. The H2O capacity is huge and make quite a bit of difference that i have noticed too. I recently used the program to narrow down the list of powders that the berger manual had for a 243 load. I narrowed it to 3 and went and shot it.


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[bigedp51]

Below are the differences in case capacity verses chamber pressure for the cases with the least amount of case capacity and the most case capacity for the .223/5.56 with 25 grains of H335. Approximately 6,000 psi difference, and you wonder "WHY" load data varies between manuals.

Quickload is good for choosing powders as stated above, below a five inch Model 29 .44 Magnum "tamed" and fun to shoot. Please notice the green and purple dotted lines, the geen line is 95% of powder burnt and the purple line is 100% burnt. If you loaded a maximum charge of 296 powder in this .44 the green and purple lines would be off the chart and the target would have scorch marks on it. (unburnt powder humor)

 

[tridiumk]

Holy shit


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[bigedp51]

Holy shit

This is "WHY" 25 grains of H335 in .223/5.56 mixed brass is used so much for practice, in a AR15 with its longer throat the max pressure is approximately 50,000 psi and 5,000 psi below maximum.