Those of you tinkering with the HR410 have done some really fine work.
Most recently I have completed some in-depth work on woven carbon shafts in various weights to solve some inaccuracy issues with bows 440 FPS and up supplied with 400ish weight arrows. My findings proved that a 1:1 ratio of FPS to GPI is the gold standard. When folks invest in the newer HR be sure to match the arrow weight to the speed rating, or greater, and you will be extremely pleased with the results.
Some like to shoot 400 or less arrows out of the HR410 chasing the speed limit. First, sub 410 arrows are hard on the bow itself due to the fact you are leaving energy in the bow rather applying the energy in the arrow. Choose an arrow with a 160-180 spine and a total build of at least the FPS rating plus 3%. Your accuracy will improve and the bow will shoot much smoother. Avoid adding tip weight to get to the weight. Doing this only causes increased shaft column buckle thus reducing accuracy. Concentrate on shaft GPI with 110 inserts, 100/125 tip, vane weight and nock weight relative to your desired shaft length to get to the desired weight.
Can you shoot "heavy" (high GPI) arrows; 450,460,,,,,,? Absolutely. Keeping in mind the affect on FPS. Heavy arrows, providing they are built in balance (correct FOC) will increase accuracy and make the bow shoot even smoother but limit extended range of the bow. 70,80,90, 100 yards would require massive hold over.
A 10.4 GPI shaft with 160 spine @ 18": 187.2
insert: 110
vanes: 20
nock: 12
tip: 125
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454.2 total would be perfect for the HR 430. Provide a smooth shot and deadly accurate if indexed.
All the great work everyone has done to make the HR 410 more reliable is fantastic effort. Let us not forget after all this great work that the projectile needs to be right for the bow shot out of.
FD