Hulp met 338wm.

[cobusvh]

Ek soek hulp van die manne wat QL en computers ken asb.

Ek het 225gr Federal Fusion en Alliant Reloader 19 in die hande gekry. n Toetslading van 72gr het gemiddelde spoed van 2560fps behaal(chrono 5m van tromp af).
My geweerloop is 610mm lank. Norma gevuurde doppe hou 90gr water en ek gebruik CCI BR2 slagdoppe.
Ek sal enige raad hoog op prys stel, ek dink na die pandemie gaan ons hard hoes vir ons skietbenodighede.
Groete.
Cobus.

[Dale SH]

What is your TPL ?

[Dale SH]

Also please measure the average length of 10 bullets.
The smallest diameter of the boat tail and the length of the boat tail.

[Dale SH]

Right off the bat I can tell you that Reloader 19 is too slow burning for a 225 grain bullet.
You will need reloader 16 or 17 to get optimal performance from your package.
Additionally I would use a good magnum primer to light it up.

[cobusvh]

Only got hold of my vernier today.
TPL 85,4mm
Bullet ave length 32,35mm
Not much of a boat tail, 1,5mm long and 8,10 diameter step at base.
Yanks seem to get good accuracy and speed with Reloder 19 and 225gr bullets. Federal suggests 69,2gr for 2580fps and max of 76,9gr(compressed) for 2876fps.
I will take your advice and use Federal 215M primers.

[tripodmvr]

http://www.alliantpowder.com/reloaders/ ... lletid=148

[Dale SH]

Cobus.

I agree with you.
Reloader 19 should be a suitable powder for your combo, but relative to default burn rates your batch is way down.
72.0 grains should be giving you +- 2720 fps and you are 150 fps down on that velocity.
As per the attached picture you are currently running near 100% case capacity and very low pressure and powder burn ( throwing flames).
Your nearest node is predicted to be 74.0 grains for 2647- 13 fps on the chrony
46797 psi ,93% burn rate and an already compressed load.

Thus my suggestion to use reloder 17 as your current batch is well below average.

[Flip Nel]

Sal 'n magnum primer nie hier beter werk nie om hom meer inlyn met qload se spoed te kry nie.

[Dale SH]

Flip.
A magnum primer will certainly help a little bit but it's not all of a sudden going to give 150 fps extra MV.

[jdpretorius]

Hi Dale just a thought/question ......with the low predicted pressure would the case perhaps not seal properly in the chamber and actually cause a loss in MV ?

[Dale SH]

JD.

Cobus's current pressure is predicted to be +- 42800 psi so It may well be that he is not achieving good bullet obturation and gas seal.
I would suggest he loads 74.0 grains with a Federal 215M primer and then we check where he's velocities are.

[jdpretorius]

Thanks Dale ......just checking my own observations and assumptions

[cobusvh]

Thanks for all that responded.
I will load 74gr and magnum primer and go test as soon as we can visit a shooting range again.