The sooper dooper pig 300wsm project thread

[Tahr]

Sometimes cases are hard to get into the shell holder if the swipes or ejector marks are raised. I rub them lightly on some fine emery paper.

[striker]

the 200eldx's- are you measuring to ogive or to tip? check that your not in to the lands at mag length
depending on how old they are Hornady had a few issues with differing ogives on some of the early batches and was screwing with my loads too.

[dannyb]

the 200eldx's- are you measuring to ogive or to tip? check that your not in to the lands at mag length
depending on how old they are Hornady had a few issues with differing ogives on some of the early batches and was screwing with my loads too.

These are fairly new, definitely weren't jammed into the lands, I measure to the ogive.
My jam or ogive measurement is 2.300" I was seated at 2.244" so effectively 56 thou off the lands not close by anyone's standards
The new ladder I had to work backwards as I only had a COAL measurement of a factory loaded round which was 2.875" COAL which worked out at 2.165" ogive.
Ughhh new barrel and new brass.....I'd rather workmwith a fouled barrel and 2x or 3x fired brass
Tomorrow is a new day and I'm confident I'll get to the bottom of things

[mikee]

Try a box of Hornady Precision hunter in it. Once you get over the sticker shock!! It has shot well in all the 300wsms I have tried it in
If it shoots OK then there's your over all length.
Load 300WSM at mag length, if you load them out like we all like to think is best, its often not!!

[striker]

These are fairly new, definitely weren't jammed into the lands, I measure to the ogive.
My jam or ogive measurement is 2.300" I was seated at 2.244" so effectively 56 thou off the lands not close by anyone's standards
The new ladder I had to work backwards as I only had a COAL measurement of a factory loaded round which was 2.875" COAL which worked out at 2.165" ogive.
Ughhh new barrel and new brass.....I'd rather workmwith a fouled barrel and 2x or 3x fired brass
Tomorrow is a new day and I'm confident I'll get to the bottom of things

Have you got GRT? Those numbers are putting you at the upper limits of your pressure at 60.5grains 2209 and thats about predicting 50fps slower than your getting at 2677.
Have a play, because if its pressuring like this at this cold, summer will be fun.

[dannyb]

Have you got GRT? Those numbers are putting you at the upper limits of your pressure at 60.5grains 2209 and thats about predicting 50fps slower than your getting at 2677.
Have a play, because if its pressuring like this at this cold, summer will be fun.

Funny enough at 60.5gn I was getting 2652fps with an ES of 21fps so your not far off the money.....I think part of my issues with weird spikes is due to inconsistent sizing of the new cases, after tomorrow's ladder will try annealing the once fired cases and resizing them.
In answer to your first question no I don't have GRT

Funny Hornandy load data shows a max load of 61.7gn of h4530 which is 2209 equivalent as far as i know.

[stug]

I think you’ve read that wrong Danny. H4350 is 61.7gr IMR4350 is 63.1 gr. H4350 is 2209. IMR4350 is close but different.

[striker]

[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 ?

[dannyb]

I think you’ve read that wrong Danny. H4350 is 61.7gr IMR4350 is 63.1 gr. H4350 is 2209. IMR4350 is close but different.

Edited my post as I caught that about the same time as your post

[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