OP
czechsonofagun
Elite Member
Egon, did you see a doctor?
Realoding fine tunning
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studor
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Frustrating isn't it
It may be that your gun just does not like 130 grain bullets -- my .270 win doesn't so after trying a bunch of different brands I decided the deer will not know whether they were hit with 140s, 150s or 130s. Try a different powder (like 4831sc or reloader 22) -- or just buy more 140s
It may be that your gun just does not like 130 grain bullets -- my .270 win doesn't so after trying a bunch of different brands I decided the deer will not know whether they were hit with 140s, 150s or 130s. Try a different powder (like 4831sc or reloader 22) -- or just buy more 140s
Egon
Epic Contributor
Prokop, I should see a Doctor as I gave you bad advice.
It is not the actual barrel end null point and projectile discharge that must coincide as the barrel is moving and will impart an acceleration of that direction to the projectile. What you will have to do is figure out a lead time using the projectile velocity and target distance to load the proper charge.
This should be right up an engineer's alley as you will be working with three unknowns and have to equate them to a coincidental point!
It is not the actual barrel end null point and projectile discharge that must coincide as the barrel is moving and will impart an acceleration of that direction to the projectile. What you will have to do is figure out a lead time using the projectile velocity and target distance to load the proper charge.
This should be right up an engineer's alley as you will be working with three unknowns and have to equate them to a coincidental point!
RavensRoost
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Prokop:
re: - groups were 56, 57, 58 and 59 grains of IMR 4350
May want to double check the load as my (old) 4th Edition Hornady loading book shows 54.8 gr of IMR 4350 is max. Did the primers look flattened or the imprint of the firing pin look strange or close to piercing? Might be too hot...
I predict you will have better results with H-4831 (Hogdon) powder as it was used in many classic 270 loads.
RavensRoost
re: - groups were 56, 57, 58 and 59 grains of IMR 4350
May want to double check the load as my (old) 4th Edition Hornady loading book shows 54.8 gr of IMR 4350 is max. Did the primers look flattened or the imprint of the firing pin look strange or close to piercing? Might be too hot...
I predict you will have better results with H-4831 (Hogdon) powder as it was used in many classic 270 loads.
RavensRoost
OP
czechsonofagun
Elite Member
Prokop, I should see a Doctor as I gave you bad advice.
It is not the actual barrel end null point and projectile discharge that must coincide as the barrel is moving and will impart an acceleration of that direction to the projectile. What you will have to do is figure out a lead time using the projectile velocity and target distance to load the proper charge.
This should be right up an engineer's alley as you will be working with three unknowns and have to equate them to a coincidental point!
I will follow it to the T, thank you, sir
OP
czechsonofagun
Elite Member
I wrote down numbers from the last Hornady book - I don't have it myself yet - and it tops at 60 grains for the 270 WSM and 130 grains SST. And no, there were no signs of high pressure. Thanks for the concern.
studor
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I think the max numbers were for a .270 Win not a .270WSM. I would try the slower powders however. I have had good luck with 4350 and heavier bullets in the .270 Win -- .270 WSM should like the slower powders mentioned
Steve
Steve
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xlr82v2
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Since you say you're inexperienced, first let's work on the machine pulling the trigger.
Make sure that your rest is rock solid. Make sure that you're comfortable sitting at your bench. Make sure that you don't forget to BREATHE!! You have to breathe when you're shooting groups... if you start holding your breath, your groups are going to reflect it. Practice shooting and breathing with a .22... get to where you can pull that trigger with absolutely no flinch at all with no ammo... dry fire... to where the crosshairs do not move on the target when the trigger breaks. Squeeze that trigger... it should suprise you each and every time it goes off. Don't slap it, or pull it... squeeze it. Then start practicing with ammo in the .22. Get to that same point... where you are just a machine at squeezing that trigger... breathing and comfortable. Once you're shooting dime sized groups at 50 yards consistently with the .22, then get out the .270WSM and try it with that.
I'll bet your groups will shrink dramatically.
You have to get the machine pulling the trigger under control first... then you can get your loads under control later. It takes practice, practice, and more practice to get the maximum out of your rifle and loads. But you first have to be confident that you're performing at your max before you can accurately determine that the problem indeed lies in the rifle and/or ammo.
Good luck with it!!
Make sure that your rest is rock solid. Make sure that you're comfortable sitting at your bench. Make sure that you don't forget to BREATHE!! You have to breathe when you're shooting groups... if you start holding your breath, your groups are going to reflect it. Practice shooting and breathing with a .22... get to where you can pull that trigger with absolutely no flinch at all with no ammo... dry fire... to where the crosshairs do not move on the target when the trigger breaks. Squeeze that trigger... it should suprise you each and every time it goes off. Don't slap it, or pull it... squeeze it. Then start practicing with ammo in the .22. Get to that same point... where you are just a machine at squeezing that trigger... breathing and comfortable. Once you're shooting dime sized groups at 50 yards consistently with the .22, then get out the .270WSM and try it with that.
I'll bet your groups will shrink dramatically.
You have to get the machine pulling the trigger under control first... then you can get your loads under control later. It takes practice, practice, and more practice to get the maximum out of your rifle and loads. But you first have to be confident that you're performing at your max before you can accurately determine that the problem indeed lies in the rifle and/or ammo.
Good luck with it!!
OP
czechsonofagun
Elite Member
Very valid points, Brian, thank you.
Since groups for BTSP 140 grain bullets from the same support and the same rifle are 1/2" I am inclined to believe it is not the nut behind the trigger who spreads it all over the paper.
Since groups for BTSP 140 grain bullets from the same support and the same rifle are 1/2" I am inclined to believe it is not the nut behind the trigger
who spreads it all over the paper.