Hry Kelsey...im sorry to butt in here...but i have one of those silly overthinking questions...
So i have 3 x 22-250's that all have different chamber measurements.
Im mostly talking about the 2 measurements i can easily measure...they are caae head to shoulder datum, & case head to ogive (where ogive contacts rifling).
Can also measure the case body dismeterat various points .
Edit...
...thats meant to read "dimensions at"...
(typing with one thumb on a mobile)
Generally speaking, i would have thought that the rifle with the "loosest" barrel (largest diameter) & largest body measurement would easily be the rifle to be able to take the most pressure...
My figuring being it would clearly have the most free volume to burn the same smount of powder, thus having less pressure build up.
It so happens thst my old shot out 788 has the largest chamber measurements, & the loosest bore, yet can take less pressure than 2 new Sako factory made barrels that are notably tighter in every measurement.
Infact all factory ammo is far too hot for it, & it starts to hit max at a very moderate 36gr of 2208 pushing the average 50gr BT...
The largest of the 2 Sako factory chamberings can go 37gr with 55's. (Albeit eith different brass so not a 'true comparison).
Infact of the 2 Sako factory chambered rifles, the one with the shortest base to shoulder measurement appears to be able to take the higher powder charge before primers start to loose their radius. ..& that is with same brand & almost identical weight brass....(admitadely not volume tested).
I have very loose understanding that the lead &/or throat area plays a part in being a section of the "combustion chamber", thus can play a significsnt role in pressure with some cartridges, so given i can't measure this section (without letting cases grow to excessive length), is it likely this area of the chambers in question are vastly different in the rifles...?
Or...
Is this just normal & indicative of the old adage that states "every barrel is different" boiling down to even the metalurgy of any given barrel being a factor in the ballistics...?
, or...
is there more to it that im missing &/or dont understand...?
Im not sure if im being clear in how im asking the question...& i know it makes no difference to how things are...but its something ive often thought of & so figured this thread is as close a lead into asking my silly question...dorry if its a bit long winded...
The man who knows everything, doesnt really know everything...he's just stopped learning...