Which of these 6x45 loads should be faster?

[Ian]

Guys,

I need some help deciding which of these two loads should be faster as I don't yet own a chronograph. They both deliver the same degree of precision, same pressure indicators, same point of impact, etc. but I'd like to sette on the faster one for med-long range competitions. The only variables are the powder type and charge.

#1 = 24.0gr. Varget
#2 = 23.0gr. AA2015

Load constants:

LC brass
Sierra 95gr. MK seated 0.005" into rifling
CCI BR-4 primer

Barrel is a Kreiger 9-twist @21"

Limited load data, so I figured someone here might be able to infer.

Thanks for your help.

 

[Chuckhunter]

Ian, According to Quick load and based on what you have given us, the AA2015 should give you approx. 100fps more velocity. Now I have found Quick Load to be a little on the conservative side in most instances but I should caution you that AA2015 load is in the dangerous area according to the program. Actually both powders are running over red line but the pressures with the aa2015 are substantially higher. Keep a close eye on that brass.

Oh yeah the program predicts: 24Gr's. Varget = 2613 fps.
23Gr's AA2015=2721 fps

Having you actual OAL could scew these figures slightly.

 

[Ian]

Thank you very much, CH!

I owe you one!

OAL was 2.523" but this morning's temp was 30F, so even though there are no signs yet, I'll probably heed your warning and back off a bit as it warms up this year.

Thanks again.
Ian

 

[Spook]

Ian, BLC-2. Difficult to beat in the 6X45 or 6TCU.

 

[Chuckhunter]

Ian, reran the numbers with your seating depth which is substantially longer than programs default. 24Gr's Varget= 2470fps @ 44744psi
23gr's AA 2015=2596 @ 54030

You should be fine but Varget appears to be a little slow. H-322 and IMR-3031 should give you better velocities.