Thread: Quick 300 WSM

This makes me happy in pants Been using 2209 in my WSM, accurate but under 2800fps

69.5gr under a 208 ELD-M was what I worked up to. I was getting over 2800 from a 24" Tikka. That's pretty crazy speed you're getting.

That is really fast. I use RL17 with the 200gr ELD X and am getting 2947fps with 61.5gr of powder. That seems like a lot of powder, can't be much room left in the case.

Originally Posted by 300wsm for life

That is really fast. I use RL17 with the 200gr ELD X and am getting 2947fps with 61.5gr of powder. That seems like a lot of powder, can't be much room left in the case.

It is compressed but when the powder is in the case there is a bit of space, it's not up the neck probably mid shoulder in the case.

Originally Posted by PommyMcPomFace

69.5gr under a 208 ELD-M was what I worked up to. I was getting over 2800 from a 24" Tikka. That's pretty crazy speed you're getting.

What powder were you using?

Originally Posted by Spitfire

Blimey - that’s fast.
Have you measured head expansion?

I’m working up a 7RM load with 180s and RE26, so will be good to see how that goes. Haven’t pushed it hard yet, but already into mid-2800s and 11 fps ES.

No I haven't, My other nephew has just got a Tikka 7mm Mag and we are going to try 162 gr eldx using RL26 , according to Alliant 69.1 grs was max for that bullet. Hope that bullet shoots OK as mine and my sons don't like them, they like the lighter bullet.Mine shoots better with 150 gr eldx the sons 140 gr Berger.

Originally Posted by Mooseman

What powder were you using?

RL26. Loaded long at 3.025". It's over 99% case fill but not compressed.

Sorry. Out of curiosity, I have modelled this in QuickLoad...

Using my own results as baseline: weighting factor set to 0.42, from a 24" tube, it reckoned I'd get ~2876fps and 57.7k psi. The labradar I borrowed said 2860fps, so I'm pretty confident QL is matching up with reality pretty darn well.

I don't know your OAL so assuming closer to a book value of 2.900". With a 200 ELD-X, it reckons you need 73.5gr to get to 3111fps (and 72.7k psi to boot).

But you're only using 69gr? That only gives 2913fps according to its estimate. The only way I can get it to line up with your chrono result is by changing the burn rate of the powder and making it quite a bit faster - 0.3397 to 0.3975. That gives exactly 3112fps but... wait for it... 83.2k psi.

Knowing that there's no free lunch and that speed and pressure go hand in hand, I would be wary of continuing to shoot that load.

I have them loaded at 2.960 in or 74 mm. That is interesting what you have come up with, I very much doubt the loads are running at 70 - 80 000 psi as the cases wouldn't be looking like they are and the bolt would be welded shut I would imagine.
I still think the chrono isn't reading true, I think your figure of 2913 fps is a lot closer. When we check the bullet drop at longer range we should know a lot more.

My 300 Win Mag with 74 grs of RL 26 runs the 200 gr ELDX at 2900 fps which I thought was pretty good. Must run a few of those through the chrono to see if they are still around that speed.

go the fairy dust,,must have as im a speed freak,,love the 300wsm

Originally Posted by Mooseman

My 300 Win Mag with 74 grs of RL 26 runs the 200 gr ELDX at 2900 fps which I thought was pretty good. Must run a few of those through the chrono to see if they are still around that speed.

I’m getting 2984 fps with 208s and 2217 in my 26” .300 Win Mag. That said, it’s using a lot more powder than some of the WSM loads mentioned here.

Checked the chrono out today. Ran some known velocity loads from my 223, 22 250, and 7 mm mag and all were pretty close to what velocity I had previously got. It appears to be reading ok . We might try a drop test out to 400 - 500 yards and measure how much drop there is, that will clear things up then.

Well we worked on that load in the 300 WSM yesterday between hunts and ran some rounds through my other Chrono and got different results from the other one. The loads were travelling at 3112 fps in my F1 chrono but in the Pro Chrono they averaged 2957 fps. We also went out to 400 yards and shot to measure the bullet drop which should have been about 17 inches which it was so we concluded that the chrono speed is correct. Today I ran the air rifle over both the Chrono's and found that the difference was about 20 fps bar one that was 47 fps different. The only thing that I can see that was causing the strange results was the pumice dust that was blasted over the chrono from the muzzle break, this could have disrupted the speed readings, other than that both Chrono's appear to be close to each other. Later on I will try some rounds from other rifles to see if there is a big difference.
The load of 69 grs RL 26 over the 200 gr ELDX that one of the members here ran over Quickload was pretty much bang on in the end. What ever way you look at it this load is a grunty one for the 300 WSM.

Thats gunna be a hammer way out there

Originally Posted by wsm junkie

Thats gunna be a hammer way out there

It's a hammer up close as the stag on the weekend found out.