Im getting ready to start reliading for my Swede AI i have 150MK's and Berger 153.3's both interchange with my throating. But all the load data from every darn source i find jumps from 142's to 160rn's but Lapua has data for there 156grn mega could a person start a grain low and work from Lapua's data? But the second problem is i have no VV powders. So if anybody would want to spill ther boundless knowledge have at it
Swede AI 150grn MK help
- Thread starter Hammer101st
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What powders do you have? What is the firearm and barrel length? What is your freebore?
Usually when starting to load for an Imp cartridge where there's no real data I start with somewhere between middle of the chart to near max loads for the parent case & the bullet weight. Or barring that, find something with similar case capacity. The 325WSM is close enough to the 338-06 Ackley to use start charges for similar bullet weights. The velocity per grain corresponded very closely between the two when working up. Pressure was apparently less due to the slightly better expansion ratio of the 338.
I have H and Imr 4350 4831sc re23 re26 imr7828 H1000 100v i can keep going i would be here for a while but those are all the ones that i would consider using as far freebore i throated the to work with said bullets so original print is not valid anymore. Barrel is 30" 7 twist shouldered bartlein on a trued short action stevens 200 AKA Savage
Yes i do to but with such a big grainage jump between 142 and 160 i dont know what to think someone said i could start with low end 6.5-284 loads but dont know
Regarding Sierra 150 MK:
I think H4831sc and R23 are your best bets. I tend toward faster powders for a combination. QL shows ~50k for 48 grains for both.
On the slower side; R26 and 7828 should also work well, QL shows ~50k for 50 grains for both.
A good start for your test series is a couple grains less in each case. I assumed an OAL of 3.2".
Drop 2 grains for the Berger due to weight and seating. If unsure of pressure, I load three rounds of each and increase in .5 grain increments.
Since it is a 30" barrel, is this an F-Open gun?
I think H4831sc and R23 are your best bets. I tend toward faster powders for a combination. QL shows ~50k for 48 grains for both.
On the slower side; R26 and 7828 should also work well, QL shows ~50k for 50 grains for both.
A good start for your test series is a couple grains less in each case. I assumed an OAL of 3.2".
Drop 2 grains for the Berger due to weight and seating. If unsure of pressure, I load three rounds of each and increase in .5 grain increments.
Since it is a 30" barrel, is this an F-Open gun?
No just rifle i allways wanted built and that little savage action i bought for 150 bucks allways shot good and i had 16 different calibers from a rum all the way down to 204r on this action. These pressures QL came up with is not recomending i go over 50k or was that starting pressures. I figured modern action i would try to shoot for 58k to 60k on pressures
Just starting loads. Use all the standard pressure criteria to assess progress.
10:4 this is the stuff i was lookin for. The load data out is just so far apart on bullet grainage i didnt know what the h*ll to think
I had to re mic my dummy round im only at 3.055 i guess i might have to rip that barrel off and throat some more. I guess i could move that bullet out more with that long neck huh?
If the shank does not reach the neck-shoulder junction with the Berger, leave it alone. That will give you more flexibility for different bullet weights and seating depth if throat erosion requires a change.
Do you mean if the berger is a little deeper and dont reach or if its past leave it alone
Fully formed & fired brass from my 338-06 Ackley holds 72.6 gr of H20 full up. Nosler #9 says the 325WSM holds 68.9gr with a seated 200 gr bullet. Very comparable. Using Ramshot Hunter their start is 63gr @2782fps & max is 67 @2948fps. After working up with similar velocities along the way, my rifle got 2915fps with 67 gr. & I was able to safely continue beyond for another 40fps before running out of case capacity. The same charge/velocity similarity happened with IMR 4350 & Ramshot Big Game.
The same Nosler book says 58.4gr H20 capacity with a seated 140 in 6.5x284 & 50.2 for the standard Swede. Following the approx. 7-10% capacity increase after Ackleying a case, 6.5x284 data should be safe with start charges.
Looking for heavier bullet data, there's also the option of using standard 6.5x55 data with either Hornady or Sierra 160 middlin' to near max as a starting basis. This book data should also be adequate for fireforming your 6.5x55 brass to the Imp version, but I would use lighter & cheaper bullets & the relevant data for their weight.
Since the latest powder/primer crunch, after at least the first fireforming, I often start with the slower powders doing a 2 round per charge increase workup over the chronograph while looking for max. pressure. The slower powders are safer because I've often run out of case capacity before reaching top pressure. If velocity/performance isn't at the desired level, then I can move to a quicker powder & start again.
The above methodology works for me, but there is certainly more than one way to skin that proverbial cat. There's always Quick Load or Gordon's RT for a baseline. I'm sure someone will run one for you if you can provide the needed data. Not sure if you'll find much, but Googling Bob Jourdan's 6.5 BJE may provide some data. If you can find a copy, there's a rather in depth article in Precision Shooting magazine from 8-92 starting on p.4 by Bob too.
Thank you
If the shank does not reach the neck-shoulder junction.
What is your fps? Im after speed first but then will drop speed to save brass. Just want to know what for speed i can get out of the heavys but not importent because we all want speed and accuracy but in the end we allways back'er down when common sence takes over
65swede
Silver $$ Contributor
Here's the ladder I shot last time out. 20" barrel and 0.015 jump. Started seeing slight primer cratering on the last two shots of the string, nothing major but the nodes were around 42.3 and 44.8 so I had no problem backing down. I think I ran out of barrel on shot 10.
And the target
My hunting load is much hotter @2900 in a Tikka 22" barrel suppressed with the 143 ELD-X, only 0.005 jump.
Its a different rifle and the throat is longer than the 20" Tikka.
I also tried R26 in the 22" gun. I ran out of barrel by the time I filled the case enough to see big velocity. Accuracy stunk. I think H1000 might be a winner if your barrel is 24"+ and 2900 fps seems easily attainable with your larger case.
IMR 4831 was a dud in my 20" gun. Didn't like the 147 ELDM or 142 SMK
R23 is a solid performer in both my rifles
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Good stuff
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