Out came the match – Tuning part 3
Please see Part 1 and Part 2 of this saga..
On Thursday evening, after a thunderstorm in mid-late evening, I ventured to the club field in the hope that a hardy soul would turn up, I found that I was that hardy soul.
In the hope that someone would show up I assembled my bow, and centred the sight pin over the the arrow shaft…after double checking the centreshot. By 7.30 I guessed no-one was going to join me so I wandered home. I had planned to replace my 100gr pile in some of my arrows with 120 gr to see if there was any noticable effect.
The first act of this evening was to shoot my 660 Navs – all 4 (3 fletched, one bare) of them. The first two ends at 20yds saw me put them into a group of about 2″ diameter. I liked that, despite them being on the blue/red border. One of my newly fletched arrows now has two lines marked down the white fletches the groups were that tight. The bareshaft was within the group on both occasions.
The first two I shot with the match still in place in the button, I removed this and replaced it with the medium tensile spring and set this at midway down the scale. The group moved to the gold/blue border and a further adjustment put this in the middle. Over the next few ends I added a few of my 610 Navs and found that they joined the group, though slightly lower than the 660′s.
The button was locked down and a couple more ends were shot at 20yds before moving on to 40yds. At this distance there was a noticable difference in the positions the two sets impacted the boss, although both were within the gold.
From this it can be surmised that the two sets of arrows tune approximately the same, though the lighter piles do affect the sightmark – this is much more noticeable at greater distances.
I later moved on to 80yds shooting solely my 610 Navs, and found that for the first few ends my arrows fell central, albeit in a vertical line, but over time this spread somewhat. On one of the later ends I decided I’d shoot one of the 660 Navs to see what the difference in sightmark was. The arrow sailed over the boss, landing somewhere near the 110 yd mark. In one sense this was good news, in another not so much so, in that I can reach 100yds, however I may need to use lower spine arrows and lighter pile to do so. However, this information is of little use as the probability of me shooting 100yds this outdoor season is slim, other than ‘to see if I can’.
I have a competition on Sunday, a double Long national..
I hope to get a chance to shoot tomorrow…
There is still stuff to do as far as tuning my bow is concerned, I’ll update as it occurs..next week.
Long story short, we shot one detail, six arrows at a
Fortunately once I got close to the venue I remembered the way there.
