Hi
ive just purchased a set of ACC 3-04 680 arrows from the easton T5 section, which are *supposedly* the best spine for my poundage of 34lb and 29". these are advertised at 7.2 grains per inch.
after building them and comparing them to my old slightly stiffer set of 3L-18 620, (7.5gn per inch) i was really surprised to find that the weight has gone up when im using exactly the same same nocks, fletchings, uni bush and pile, in fact the old pile weighed 82 grain and my new ones 80).
the weight comparisons are 319gn for the 620's and 323gn for my new 680's fully built.
ive weighed each componont accuratly and by my calculation expected a small overall drop of about 10gn or so per arrow (28.875 * 0.3) + 2gn for the pile, instead its risen by 4gn.
while i realise that to be out by about 14gn isnt much, how can this be? any ideas welcome, as it's the 680 shaft thats heavier than the 620, and appears out of the tolerance id expect.
thanks
Bob
ive just purchased a set of ACC 3-04 680 arrows from the easton T5 section, which are *supposedly* the best spine for my poundage of 34lb and 29". these are advertised at 7.2 grains per inch.
after building them and comparing them to my old slightly stiffer set of 3L-18 620, (7.5gn per inch) i was really surprised to find that the weight has gone up when im using exactly the same same nocks, fletchings, uni bush and pile, in fact the old pile weighed 82 grain and my new ones 80).
the weight comparisons are 319gn for the 620's and 323gn for my new 680's fully built.
ive weighed each componont accuratly and by my calculation expected a small overall drop of about 10gn or so per arrow (28.875 * 0.3) + 2gn for the pile, instead its risen by 4gn.
while i realise that to be out by about 14gn isnt much, how can this be? any ideas welcome, as it's the 680 shaft thats heavier than the 620, and appears out of the tolerance id expect.
thanks
Bob