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long throated .270 wsm advice

 
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  #8  
Old 03-13-2008, 10:35 PM
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My son is shooting that same load with the exception of the primer. We are using Federal 215 Magnum primers in this load and averaging 3030 fps on a four shot string out of a 23" bbl. Do you have access to magnum primers? Try them if you do, but start low and work your load back up to max.
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  #9  
Old 03-15-2008, 03:40 AM
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memyselfni,
I am loading for this same rifle as yours, except it belongs to friend of mine.

But here is what I've found in searching for loads:
"150 gr Bullet"
60 grs of H4831 will give close to 2960 (Speer)
60 grs of H4831 will give close to 2960 (Hodgon)
60 grs of H4831 will give close to 2960 (Nosler)*
67.5C of H1000 will give close to 3000 (Hodgon)
63.3 of RL22 will give close to 3000 (Sierra)*
*Most of their loads are usually off compared to other books.

"150 Barnes X"
67 grs of RL22 will give close to 3010 (Barnes)

Yes to the Mag primers...Usually once you go over 65 gr in any cal, then the magnum rule applies

Hope this helps some what..
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Larry

Last edited by glassman; 03-15-2008 at 04:14 AM.
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  #10  
Old 03-15-2008, 04:09 AM
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Quote:
Originally Posted by memyselfni View Post
Hi
the rifle has a very long throat, and i am having trouble getting the listed velocities out of it, can anybody help me with this?
Gary
You say a long throat? I don't understand how a long throat can stop you from getting high velocites? If you have a "short throat", then you would see "lower" velocities, because you will be seating the bullet deeper, hence less room for more powder.

I like my rifles with "long throats"....as long as the bullet can touch the rifling's and still fit the magazine.
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  #11  
Old 03-15-2008, 06:21 PM
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long throat

yes it has a long throat, i cant get anywhere near the lands with the bullets fitting in the mag, a dummy round loaded to just touch, will not even cycle thru the action, i have been told that the long throat reduces pressure, and because of this, velocity. I am posting to find out if i can just work my loads up past max to combat this? as this is what i have been told i can do, will try the mag primers tho
Gary
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  #12  
Old 03-15-2008, 08:19 PM
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Quote:
Originally Posted by memyselfni View Post
Hi
I am using 59 grains of 2209 , which is equivalent to H4350, the adi powders are the most easily available over here, and i am going by the ADI Manual, i am one grain over the max allready giving me just on 3000 ft/s on my chrony with a 140gr accubond and ssts with consistant MOA 3 shot accuracy at 100 yards. I also have a tin on ADI 2225, which is supposed to be the equivilant of retumbo and RL 25,how will this powder perform? how fast should i be able to drive a 150 grain bullet out of this rifle? also, i have a leupold vxIII 2.5-8x36 on this rifle because i do a lot of walking up mountains, do you think i will be able to 'click up' for distances to say 500 yards? will i have enough energy out there? (My longest shot so far was some feral turkeys with it at 300 yards),
thanks
Gary
I live in Australia,and I think I can help you out,AR 2225 IS Retumbo,that's what it's sold as in the US.AR 2217 IS H1000,same as before.I believe this is the slowest powder you should be using in your 270WSM.(I have a 270 Weatherby) and I heed my own advice!
AR 2225 is WAY too slow for your case capacity!
You should be able to get just shy of 3100fps with 150gr bullets.
Try a load of AR 2217 with a start load of 71gr-max load of 73gr with 130 gr bullets.
AR 2217 start load of 66gr-max load of 70gr with 140gr bullets.
AR 2217 start load of 64gr-max load of 67.5gr with 150gr bullets.
If Reloader 25 is available in New Zealand,I would also give it a try.
The charge weights above for AR 2217 can be used for Reloader 25 with no problems,as long as you work up from below max by no more than 5%.
Now if you have a long throat you MAY be able to increase your loads until you get high pressure signs;ejector marks on case head,flattened primers,blown primers,sticky bolt lift(this may be NORMAL in WSM rifles) and larger than normal expansion of case body just ahead of the extraction groove.This symptom will most likely appear when you full length size your cases(recommended for WSM brass).
The above loads can be found in Nick Harveys' Practical Reloading Manual,I'm sure it's available in New Zealand,this one is the 8th edition.
The size and magnification of your scope really plays no part in your ability to shoot at longer ranges.You need to sight your rifle for it's maximum point blank range (MPBR).This varies with each load and bullet weight,but if you want to take shots at 500 yds you will generally need to sight in 3"-3.5" high at 100 yds to have a drop of no more than 12"-16" at 500 yds.which negates a backline hold on Reds and Sika.
Harveys manual can give you the MPBR for your rifle,it's in the back of the book!
Keep increasing your loads until you get signs of high pressure,then back off a few grains.
MagnumManiac
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  #13  
Old 03-15-2008, 08:30 PM
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Quote:
Originally Posted by glassman View Post
You say a long throat? I don't understand how a long throat can stop you from getting high velocites? If you have a "short throat", then you would see "lower" velocities, because you will be seating the bullet deeper, hence less room for more powder.

I like my rifles with "long throats"....as long as the bullet can touch the rifling's and still fit the magazine.
A long throat DECREASES pressure because the bullet has further to travel before it engraves the rifling,a short throat INCREASES pressure because of the opposite.Simply put,a long throat increases capacity giving you less pressure.This is how Weatherby rifles take such large doses of powder,because they are 'freebored' much further than conventional rifles.
What you describe above is actually 'normal' throating,if you can seat bullets out to touch lands,then you have a normal throat in most cases.
The magazine length in a WSM size action is the determining factor in OAL of the cartridge,which is very short against 'normal' length actions,this is why this rifle has a 'long throat'.
MagnumManiac
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  #14  
Old 03-16-2008, 04:26 PM
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Mpbr

MagnumManiac,
thank you for your advice, it has been the most relavent help i have recieved so far, i will try some 2217 when i get a chance to pick some up, will i not be able to match the speed of factory loads with the 150 Gr sst? or am i better off with the 140 ab do you think, i understand the MPBR theory, i have sierra infinity on my computer and use that when sighting in my rifles, your data is the same as the data in the ADI smokeless powders handloaders guide, and i will give it a try, thanks for your help it is much appreciated. i cant wait to get this rifle sorted, i am going to upgrade to a Bushnell elite 6500 when i get the chance, these scopes sound excellent for my use, where i might have a 10-20 yard shot in the Manuka one minute, then a 350-400 yard shot across a gully the next.
thanks
Gary
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