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How to create a accurate load

 
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  #8  
Old 11-11-2007, 09:15 PM
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Location: Juneau, Alaska
Posts: 213
LT,

I have a .270 wby and fought this battle for quite a while. Tried many different powders with no good results. I finally tried some 150 gr. partitions and it settled right down. I had to conclude that my rifle did not like 140 gr. bullets.

Festus
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  #9  
Old 11-11-2007, 10:54 PM
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Join Date: Jul 2004
Location: Texas
Posts: 5,421
L T

After wasting thousands of test loads on different rifles/pistols
I decided to use the method recomended by ED SHILLEN and
it saves lots of time and components.

#1 After prepping your brass weight sort (I try to stay within
1gr).
#2 Select several powders that reach max pressure at 100% case
density.
#3 Load a starting load with several different primers that the loading
data recommends (rem,win,cci,fed )in the size range (Large rifle,mag)
#4 pick the bullet weight you would like to use and load 3 to 5 of each
load.
#5 Chronograph all loads( What you are looking for is low standard
deviations ) under 15 but single digit numbers are very good. this tells
you that you have a very consistent powder/primer combo.
#6 With the best load found start with .030 bullet to land clearance
and reduce to .005 just off the lands in .005 increments for best group
size.

At 100yrds a poor load and a good bullet may shoot good groups but
when you shoot longer ranges that same load will probably shoot poorly.

And allways start with a good stock to barreled action fit that could
prevent even the best load from shooting.

Works for me
J E CUSTOM
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  #10  
Old 11-12-2007, 02:21 PM
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Join Date: Jul 2001
Posts: 1,459
Article

There is reload and tuning article on the homepage that might be helpful.

Jerry
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  #11  
Old 11-12-2007, 06:34 PM
Bronze Member
 
Join Date: Nov 2005
Posts: 56
Quote:
Originally Posted by J E Custom View Post
L T

After wasting thousands of test loads on different rifles/pistols
I decided to use the method recomended by ED SHILLEN and
it saves lots of time and components.

#1 After prepping your brass weight sort (I try to stay within
1gr).
#2 Select several powders that reach max pressure at 100% case
density.
#3 Load a starting load with several different primers that the loading
data recommends (rem,win,cci,fed )in the size range (Large rifle,mag)
#4 pick the bullet weight you would like to use and load 3 to 5 of each
load.
#5 Chronograph all loads( What you are looking for is low standard
deviations ) under 15 but single digit numbers are very good. this tells
you that you have a very consistent powder/primer combo.
#6 With the best load found start with .030 bullet to land clearance
and reduce to .005 just off the lands in .005 increments for best group
size.

At 100yrds a poor load and a good bullet may shoot good groups but
when you shoot longer ranges that same load will probably shoot poorly.

And allways start with a good stock to barreled action fit that could
prevent even the best load from shooting.

Works for me
J E CUSTOM
J E,
Thanks for the info.
One question how do you know how far your bullet is seated off the lands? Is there a tool out there that can assist with this process? Currently I have the bullet as far out as the magazine will let me. Because the gun I'm having trouble with is a .270 Weatherby mag. how much will the free bore be an issue?

Thanks Aaron
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  #12  
Old 11-12-2007, 06:55 PM
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Join Date: Feb 2006
Location: Pueblo, CO
Posts: 286
Several gauges available, I use the stoney point (now Hornady) comparator with head & shoulders gauges, Sinclair makes a good one too. Freebore does make a difference every bullet likes a different jump to the lands some like to be seated in the lands some like as much as .02" of jump (in my experience). And of course the individual rifle has it's own pallate. You can do it without the gauges of course. Just seat long and keep screwing down the seater plug untill the action closes easily, then go from there in increments, though it's much more precise with the gauges.
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  #13  
Old 11-12-2007, 09:59 PM
Platinum Member
 
Join Date: Jul 2004
Location: Texas
Posts: 5,421
LT

Weatherbys have lots of freebore and normally cant be reached
even if loaded very long.

Neck size only and a near zero headspace will be achieved then
freebore is not a problem.

Some bullets seem to like lots of jump (.050 to .060) like the Barnes
XBT.

I like the accubond and have had good luck loading it and also the
partition.

If you have a light weight barrel you may have to use tip pressure
to settle it down.

Look back on bullets,barrels and blistics to a post called Weatherby
mark 5 pressure,by 300 Winnie, dated 08/19/07 and there is a method
on how to apply tip pressure described that may help.

Good Luck
J E CUSTOM
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