Ok I know there's a lot of variables but bear with me while I try to explain what I've got going on/experienced.
These loads are from Lymans CB book.
45acp
200gr lead bullet
4.0gr bullseye (min 3.5gr)
fps 700'ish (est haven't chrono yet)
CUP 7,000 (est)
OAL 1.200
Same gun/bullet
4.5gr w231 (min 4.0)
fps 700'ish (again, est)
CUP 9-10,000 (est)
Same OAL
Both loads are extremely accurate with light/modest felt recoil.
Same gun/bullet
5.5gr Unique (min 5.0)
fps 700'ish (est)
CUP 7,500 to 8,500 (est)
Same OAL.
Felt recoil on this load was very hard. So much so that after only 7 rounds, I quit, took the remaining 18 home & pulled them thinking something went amiss. Charge was spot on at 5.5gr.
So I loaded another 10
5.0gr (min book load)
fps less than 700 (est)
CUP less than 8,000.
Felt recoil still seemed a lot harder than the BE or 231 loads, more than what I want (but less than the original 5.5gr load)
Which brings me to the question of...
If gun & bullet weight stay the same and FPS and CUP are within proximity, shouldn't felt recoil be close to the same?
I know Unique is slower than 231 or BE but with all else being relatively close to equal, shouldn't felt recoil also be equal?
These loads are from Lymans CB book.
45acp
200gr lead bullet
4.0gr bullseye (min 3.5gr)
fps 700'ish (est haven't chrono yet)
CUP 7,000 (est)
OAL 1.200
Same gun/bullet
4.5gr w231 (min 4.0)
fps 700'ish (again, est)
CUP 9-10,000 (est)
Same OAL
Both loads are extremely accurate with light/modest felt recoil.
Same gun/bullet
5.5gr Unique (min 5.0)
fps 700'ish (est)
CUP 7,500 to 8,500 (est)
Same OAL.
Felt recoil on this load was very hard. So much so that after only 7 rounds, I quit, took the remaining 18 home & pulled them thinking something went amiss. Charge was spot on at 5.5gr.
So I loaded another 10
5.0gr (min book load)
fps less than 700 (est)
CUP less than 8,000.
Felt recoil still seemed a lot harder than the BE or 231 loads, more than what I want (but less than the original 5.5gr load)
Which brings me to the question of...
If gun & bullet weight stay the same and FPS and CUP are within proximity, shouldn't felt recoil be close to the same?
I know Unique is slower than 231 or BE but with all else being relatively close to equal, shouldn't felt recoil also be equal?