The sooper dooper pig 300wsm project thread

[dannyb]

Attachment 197565

I wasn't doubting you, what effect do you think seating the projectiles deeper into the case will have on velocity and pressure, out of curiosity ?

[PerazziSC3]

I wasn't doubting you, what effect do you think seating the projectiles deeper into the case will have on velocity and pressure, out of curiosity ?

As case capacity decreases pressure increases. Pressure = velocity. Putting them deeper, all things equal will raise pressure

[striker]

I wasn't doubting you, what effect do you think seating the projectiles deeper into the case will have on velocity and pressure, out of curiosity ?

Pressure goes up, 0.25 shorter drops 2.5 grains for the same pressure
@PerazziSC3 beat me too it

[dannyb]

As case capacity decreases pressure increases. Pressure = velocity. Putting them deeper, all things equal will raise pressure

Pressure goes up, 0.25 shorter drops 2.5 grains for the same pressure
@PerazziSC3 beat me too it

...... might have to pull a few then increase in pressure will increase velocity too ?

I have loaded a new ladder at saami COAL from 60gn-62.5gn going up in .5gn increments, I will pull the 62.5 and 62gn loads I am skeptical I will even get that high in the ladder as will be on high alert for pressure signs after todays session.

[striker]

...... might have to pull a few then increase in pressure will increase velocity too ?

predictions only 61.5Grains 2707fps 65kpsi, 62.5Grains 2750fps 69kpsi

[dannyb]

predictions only 61.5Grains 2707fps 65kpsi, 62.5Grains 2750fps 69kpsi

Is that accounting for the 19" barrrel ?
Sorry for all the questions and thanks for all the advice I do appreciate it
Will definitely pull anything higher than 61.5gn

[striker]

Is that accounting for the 19" barrrel ?
Sorry for all the questions and thanks for all the advice I do appreciate it

Yep, only way more is zero scales with primed case on and weigh the water volume
they are only predictions, as always work up
better than eating the case pressure, seen that once, don't need to see that again anytime soon