7.21 firebird
- Thread starter mikael
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Seabeeken
Well-Known Member
Download Gordons reloading tool. Youll find the 7.21 there
www.grtools.de
Its free
start [Gordons Reloading Tool Community]
Its free
we have a firebird and hoping to shoot the 195 eols can you give any data ?
Seabeeken
Well-Known Member
Possibly. Water capacity of a fired case, COL, barrel length, twist, and what powder you have available?
113.5 h2o usable , max col 3.85 , barrel 30 inch 8twist 20n29, h5010 , us869 ,h50bmg , rl50 , 8133 , n570, rl 33 , h1000 , 24n41 ,rl26 n565 , n560,
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Seabeeken
Well-Known Member
20N29 Max 105 gr
IMR8133 Max 88 gr
N-570 Max 90 gr
24N41 Max 95 gr
RL-26 Max 82 gr
H-1000 Max 85 gr
N-565 Max 84 gr
N-560 Max 81 gr
Powders not listed here arent in the latest version of GRT. These are MAX loads based on data you gave. I recommend backing off at least 10% to start.
Merry Christmas
IMR8133 Max 88 gr
N-570 Max 90 gr
24N41 Max 95 gr
RL-26 Max 82 gr
H-1000 Max 85 gr
N-565 Max 84 gr
N-560 Max 81 gr
Powders not listed here arent in the latest version of GRT. These are MAX loads based on data you gave. I recommend backing off at least 10% to start.
Merry Christmas
thank you
total case cap to the top 122.4 the 113.5 is to the bottom of the shoulder junction to the case body my error
Seabeeken
Well-Known Member
Well that changes everything. disregard everything I sent before. Case capacity is a fired case filled even with case mouth. Details are critical with GRT and QL. Garbage in, garbage out, even measuring bullet weight and length matters as they can be different than the data in the programs.
Seabeeken
Well-Known Member
20N29 Max 108 gr
IMR8133 Max 93 gr
N-570 Max 95 gr
24N41 Max 101 gr
RL-26 Max 86 gr
H-1000 Max 90 gr
N-565 Max 89 gr
N-560 Max 86 gr
These are calculated at a temp of 70* and will be over pressure at higher temps. Also, if you seat bullet deeper than the max COL you gave me, they will be over pressure. These loads are a PREDICTION by software, NOT hard tested data. Back off and work up carefully.
IMR8133 Max 93 gr
N-570 Max 95 gr
24N41 Max 101 gr
RL-26 Max 86 gr
H-1000 Max 90 gr
N-565 Max 89 gr
N-560 Max 86 gr
These are calculated at a temp of 70* and will be over pressure at higher temps. Also, if you seat bullet deeper than the max COL you gave me, they will be over pressure. These loads are a PREDICTION by software, NOT hard tested data. Back off and work up carefully.
Thank You testing temp 20* of 20n29 106 grain 3343 h50bmg 3350 103 grain and h5010 106 grain 3435 top of pressure looks like we can load to 3375 with several powders and work for a node in the testing all shots within 1 inch of each other
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