The sooper dooper pig 300wsm project thread

[Moa Hunter]

now my good buddy...WHEN you have finished pissing around getting your load sorted and want to really try them out......Man do I have the place to take you..cold frosty morning up at sparrows fart and the wallabies will be out ,like the sun sluts they are...ranges from 50yard out to as far as you dare...best we have done was seeing 23 from one spot at same time.... who cares if its a big round and might cost a wee bit ,there is NOTHING that will boost your faith and confidence like tipping over/blowing up some hoppersAttachment 198203

Steeeep I bet they roll !

[dannyb]

Finally cracked it
After not getting the velocity I wanted outta the 200gn eldx I have to admit I was starting to wonder if my super short 300wsm might've been a bit ambitious.
As you'll know I ordered some targex 190gn to try.
I loaded up a charge weight ladder based on some GRT calculations provided by @striker now I'm not gonna lie my charge weight ladder didn't inspire confidence
I got good velocity but hit pressure quite early and considering I loaded my ladder to not be near pressure I was a little surprised.
What I also noticed was that I was getting weird velocity spikes, I couldn't place the culprit and even though I was shooting for es not groups I was also quite disappointed that none of the charges shot anything close to a respectable group.
So charge weight ladder was all loaded to saami length 2.85 COAL 3 at each weight.

62gn velocity 2719, 2718 and 2786 fps
62.5gn velocity 2775, error, error
63gn velocity 2741, 2778, 2792 (pressure)
63.5gn didn't shoot as heavy bolt and flat primers previous load

As you can see velocity was a bit all over the show and even though I had a wee spike at 62gn I decided to do a seating depth ladder at 62gn then tweak the charge weight if needed after that.

So going off the info Berger punlishes on their bullets I loaded up a ladder all at 62gn but varied seating depth from 10thou off lands out to a massive 130thou off the lands
I was sceptical that the bigger jumps would shoot but this is what Berger swear by so worth a crack.

10thou: 2756, 2738, 2718
50thou: 2721, 2729, 2754
90thou: 2744, 2734, 2736
130thou: 2736, 2703, 2742

So 10, 50 and 130thou all shot similar sized groups and not particularly great which is no shock looking at the velocity spreads.
However 90tho shot a group just over 1/2 " and interestingly the velocity spread dropped to a very acceptable 10fps.
That'll do nicely, velocity was plenty enough for what I want, accuracy is on point and this should be well below pressure.
What I found interesting was that the velocity spikes seem to coincide with the seating depths that didn't shoot well.
Remember all the seating depth ladder are at the same charge weight.
Anyway, I need to load up a few more confirmation rounds just to make sure it isn't a fluke and also shoot them over a labrader as all thus data has been gathered shooting over an optical chrono which whilst it gives consistent data the velocity can vary depending on conditions.

Here are the seating depth targets.

10thou




50thou



90thou



130thou

[veitnamcam]

Why the obsession with ES if its only going to be a 500 od meter gun?

[dannyb]

Why the obsession with ES if its only going to be a 500 od meter gun?

Consistent is accurate, accurate is consistent

[veitnamcam]

Consistent is accurate, accurate is consistent

Yeah and nah.
Some factory ammo can shoot tiny little groups and still have speeds all over the show.
I see the point if trying to develop a load for LR ELR shooting but even a 50fps spread would make little to no difference in a hunting rifle.

[dannyb]

Yeah and nah.
Some factory ammo can shoot tiny little groups and still have speeds all over the show.
I see the point if trying to develop a load for LR ELR shooting but even a 50fps spread would make little to no difference in a hunting rifle.

Well it works for me, I'll never be a bench rest or comp shooter but I'd like to think I do ok with what I'm doing.

[BRADS]

Yeah and nah.
Some factory ammo can shoot tiny little groups and still have speeds all over the show.
I see the point if trying to develop a load for LR ELR shooting but even a 50fps spread would make little to no difference in a hunting rifle.

Bang on Cam

Sent from my SM-S906E using Tapatalk

[dannyb]

Bang on Cam

Sent from my SM-S906E using Tapatalk

I totally agree have seen it myself, I'll still stick with what I'm doing as clearly I have achieved the results I was aiming for
If there was a magic way to develop a load without all the dark arts and testing I'd be all for it but till then my way works for me

[dannyb]

What's also interesting is that berger state in reference to the seating depth test "The remarkable reality of this test is that one of these 4 COALs will outperform the other three by a considerable margin."
I was sceptical but the evidence is quite stark

Here's a link https://bergerbullets.com/getting-th...in-your-rifle/

[wsm junkie]

I've done that Berger test a few times and it definitely shows the sweet spot.
Heres one with 215 hybrids which clearly shows -10 as best.


I did it with the 208 amax and -90 was on the money but havnt got a picture of that one

[chainsaw]

I've done that Berger test a few times and it definitely shows the sweet spot.
Heres one with 215 hybrids which clearly shows -10 as best.
Attachment 198372

I did it with the 208 amax and -90 was on the money but havnt got a picture of that one

the group at 130 jump is not too shabbie either

[wsm junkie]

the group at 130 jump is not too shabbie either

Nah i didnt even bother shooting the 130 as it was obvious the groups were opening up. That group top right was with the -10 after i had adjusted scope to zero it

[dannyb]

I've done that Berger test a few times and it definitely shows the sweet spot.
Heres one with 215 hybrids which clearly shows -10 as best.
Attachment 198372

I did it with the 208 amax and -90 was on the money but havnt got a picture of that one

Yeah I was pretty suprised at the difference, I was totally on board that seating depth can "tune" a load but I really didn't think it would be that stark.

[dannyb]

To put this load in perspective at 500y I am still carrying 2000fps and 1687ft-lbs which will be ample knock down.
I don't dip below 1800fps till 700y where I'll still be carrying nearly 1300ft-lbs

[dannyb]

The next hurdle will be to see how the virgin brass loads perform vs the reloaded brass I've been using for the load developement.....
Either way I'll load up a few of each and run them over a labradar this weekend and report back