TassieTiger wrote:Is it true you cannot over pressurise with TB ?
Blr243 wrote:My understanding is that irs safe in everything unless ,it’s compressed ( broken grains and more surface area) or Too much space inside the partially filled case
marksman wrote:not having more specifics l have done a standard extrapolation on quickload using the woodleigh 440gr bullet that may give you an idea of where to start
since woodleigh make the bullet they usually would have a reloading listing of it but my manual doesn't
LawrenceA wrote:I WANT a plinking round
LawrenceA wrote:I am gobsmacked at the loads!
Bill wrote:LawrenceA I've got quickload data for my 500 A Square 440gr Woodleigh and Trailboss
31gr of TBoss is 73% case capacity for 1363fps 21k psi 1814 ftlb energy
37gr of TBoss is 87% case capacity for 1495fps 27k psi 2184 ftlb energy
43gr of TBoss is 101% case capacity for 1617fps 33k psi 2556 ftlb energy
I reckon your 500 Jeffrey would be pretty close to the A Square in capacity so these loads should be well safe, I wouldn't go too far below 70% case capacity for safety reasons and go to Spotlight or your local haberdashery and grab some Dacron to use as filler.
LawrenceA wrote:Thanks all for all your help.
It will make a world of difference.
Honestly I am old school. Never seen a chronograph and basically use data just to start me going looking for an adequate load.
What you have provided will allow me to do this with a better idea of where to safely start.
I fully understand, as mentioned above, all the data you find is a guide at best.
Even data you get from your rifle on any given day is virtually not repeatable as climatic conditions change and components vary from batch to batch.
Blr243 wrote:And if so can anyone here suggest a tb load for a 525 grain lead hawks bullet in my 4570. At 1100 FPS ? God bless and I owe you a Cold beer On a hot day
Blr243 wrote:I thought the only way to get a certain pill travelling at a certain speed was to research and do physical experimenting. But all this quick load data talk makes me think there is possibly computer programs to get me close? Is this true ? And if so can anyone here suggest a tb load for a 525 grain lead hawks bullet in my 4570. At 1100 FPS ? God bless and I owe you a Cold beer On a hot day