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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 09:45
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X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

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I'm looking for load data for a .270 wsm with 150 gr. Sierra btsp Gameking with IMR 4831 powder. I've developed the load already, working up carefully, but now I don't have any idea how fast it is. Anybody got a book with such information in it?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 09:51
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Trigger how many gr. of powder?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 09:56
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 If you haven't seen this it may help: http://data.hodgdon.com/cartridge_load.asp
Just look up .270 WSM. Both the Sierra and Hornady are cup and core bullets so fps should kinda comparable.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 10:00
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Originally posted by 300S&W 300S&W wrote:

 If you haven't seen this it may help: http://data.hodgdon.com/cartridge_load.asp
Just look up .270 WSM. Both the Sierra and Hornady are cup and core bullets so fps should kinda comparable.


EXCELLENT!  I use this as well.        Excellent
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 10:06
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                                                   AW GEEZE  Embarrased                        
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 10:23
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i don't know what degree of accuracy in velocity estimation you're looking for, but without a chronograph, you could be off by 100fps or more. then again, you might be right on.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 10:33
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 Yea Dave,we've been on him about a chrongraph and he agrees but his funds are short. I never thought about mentioning to him about going in with a couple guys on one though,til now.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 16:47
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X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

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61.5 gr. powder. I think I have an idea of how fast they are, but I'm not sure.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 16:58
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X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

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Guessing based on how they hit, and how the power was set on my Rapid-Z scope, I'm guessing they're coming out at 3000. I set the scope to 11.5x, and sighted 1.25 in. high at 100. they hit dead on at 400, just like they were supposed to.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 17:04
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        Excellent
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 17:09
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X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

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Are you saying that you think I'm correct?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 17:15
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according to my books   61.6 is max for 150gr.nosler ballistic tip you should be OK but I wouldn't go any higher.!
 you are probably just at 3000fps...


Edited by rifle looney - February/07/2009 at 18:04
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 18:26
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X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

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Originally posted by rifle looney rifle looney wrote:

according to my books   61.6 is max for 150gr.nosler ballistic tip you should be OK but I wouldn't go any higher.!
 you are probably just at 3000fps...
That's what I had for a max also. I can't believe I'm not seeing any pressure signs yet. I don't want to push it any more, but it seems odd that the factory primers are so distorted, and I see no signs at all. They must be running some serious pressure.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 18:32
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flattened primers don't always determine high pressure.some times you get them when only neck sizing your brass and some times it just happens I shot some factory federals with barns-x and all the primers flattened?  are you having sticky or hard bolt opening?


Edited by rifle looney - February/07/2009 at 18:33
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 18:57
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  How about a recoil diff between factory and your reloads?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2009 at 21:49
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X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

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My hottest loads almost seem louder, but not more recoil. No sticky bolt lift, discoloration, or case necks in rough shape.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2009 at 07:17
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  Watch for ejector marks on the casing base around the primer!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2009 at 09:26
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Haven't seen any yet. I'm waiting to see something that tells me that the cases are shot too. I've loaded some of them four times already, but they look fine. I don't know how much further I want to push them.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2009 at 09:50
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  If your satisfied with the accuracy don't worry about"pushin em"as you've got to be getting decent velocity. Another few fps isn't gonna matter . If your satisfied now just wait until you can verify the velocity on a chrono. For now keep track of how the primer pockets are holding up. That's the first thing I see as far as casings wearing out. I don't even keep track of how many times I reload my casings after I develop a load. Use to but no more. But when I did I would pitch my casing after 10 times reloading them and honestly don't remember the pockets being loose so could have kept using them. Now I just pitch a casing if the primer goes in to loose. I'm getting GOOD velocity(avg 3370 w/150gr and 3118 w/180gr)and GREAT accuracy with GOOD casing life so I'm satisfied. I probably could have went a bit more but the chronograph was showing what I consider approaching max so I baked off a bit. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2009 at 09:53
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Jeez, what are you shooting. That's moving right along. I assume my Speer Hot Cor bullets will perform pretty similarly. They are both just cup and core bullets, 150 gr., but the gameking is a boat tail.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2009 at 10:02
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Trigger get a hold of some Nosler partitions or ballistic tips and see what happens these are my favorite I use all around.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2009 at 10:10
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  +1 on the Partitions. The 115gr are all I use in my son's .25-06. The Ballistics Tips are ACCURATE as all get out but I don't like the damage they do on game at the velocities I use. That's something a hunter has to decide for themselves. There is NO right or wrong as long as the accuracy is there.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2009 at 10:14
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Partitions are spendy. I have to admit though, I considered some accubonds. I've hit deer with them before, and they tend to make things very dead, very quickly. I have to say though, I'm not a believer that a guy needs premium bullets to kill deer. A regular old boring soft point works just fine. Right now I'm just looking to load some game kings for practice, and some for hunting, and play with some 130 hornady interlocks, because I have them, and they showed promise in my gun. I've never had a 130 shoot decent out of it before. I'll also play around with 140 SST's, and 150 Hot Cors, because that's whats sitting in front of me. Once they are gone, if nothing groups like the game kings, I'll just keep loading them, and look for a light varmint load. I was thinking maybe a 110 gr. v-max.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2009 at 10:50
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  Sounds good ta me!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/09/2009 at 12:09
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From the 2008 Hodgdon Annual:

270 WSM   Hdy 150SP  24" Barrel  Case: Winchester  Primer: Winchester LRM COL: 2.740"
IMR 4831  59.3 Grs  2916 FPS  63,000 PSI
 
Also, be sure to back off and work back up when you buy more powder and it is a different lot number.
 
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