Hulp met 300WSM Lading asb

[Leon Crous]

Goeie middag kêrels,
Ek wil graag vriend uithelp met lading vir sy nuwe 300WSM.
Kan julle asb help met moontlike lading- aanbevelings?

300WSM Tikka T3X Lite
Loop lengte = 24.3"
Twist = 1-in-10
Lapua doppe
Virgin dop = 79.16gr H2O
1 keer gevuurde doppe (in sy geweer) = 81.02gr H2O
Norma Bondstrike 180gr punte
White River Magnum Primers
Gemete TPL van geweeer = onbekend (nie gemeet nie)
Gelaaide TPL van Patroon = 2.860 duim
20thou Neck Tension

H4350 gelaai @ 62.7 gr = 2968, 2981, 2958
H4350 gelaai @ 63 gr = 2994, 2983, 2972, 2964, 2979
H4350 gelaai @ 63.3 gr = 2960, 2999, 2984
Alles ft/sec gemeet met Garmin

Laat weet asb wat julle op QL sien vir moontlike lading/node?
Groete,
Leon.

[Dale SH]

Leon.
What I am seeing here is that BRF (burn rate factor) relative to default is unbelievably high, indicating the bullet may be in the rifling.
Your 63.3 grain load is already at 67065 psi !!!!
Your chronied speeds should be at least 70-100 fps slower that what you measured.

[Leon Crous]

Thanks Dale.
I will go and measure Max TPL and give feedback.
But it hard to believe that the bullet is in the lands .... 2.860 inches is SAAMI spec?
Will let know asap.
Kind regards,
Leon.

[Dale SH]

Leon.
You are correct in saying that your current COL is SAAMI spec but remember that it is maximum SAAMI spec and the max COL for your rifle will depend on the chamber and more so the bullet taper and where the ogive of the bullet sits. A round nose will have a much shorter max COL in comparison to a spitzer shaped bullet.
As a matter of interest and to double check myself I reverse calculated Hogdon's data with a 180 grain Scirocco,24 inch barrel and H4350, and their calibrated BRF through the load range was fairly close to quickload default for H4350 from min to max load,
Your BRF was extremely high through your load range from the start.