Considering the cost of moulds I was very reluctant to buy 8 & 10oz moulds due to the cost and the fact that I already had 7 & 9oz moulds.
It however got me thinking about adding weight to the boom. this would not only upgrade a 7oz to an 8oz but would also overcome the problem I beleive 80% of slide sinkers have and that is to assist with casting all the weight is at the wrong end of the sinker when you want the grapnels to dig in.
I make my booms out of a single strand of 2mm s/s spring wire so slipping a 1oz barrel sinker on was no trouble. It all looked a little odd but the other day I hauled 1 out and cast it into an area where I normally struggle to get a 9oz to hold and it gripped just fine.
I think the barrel sinker is key as it is long a allows the weight to be spread further back on the boom. This is a little like they do with boat anchors where you add a peice of chain to the anchor before the rope. The extra weight on the boom does the same as the chain on the anchor. It keeps the boom down while the angle of your line is trying to pull it up, this allows the points of the grapnels to dig in better.
Here is a pic of a 7oz with a 1oz barrel sinker added. I also do a 9oz with a 1oz barrel sinker and I think if that doesn't hold it's hometime
It however got me thinking about adding weight to the boom. this would not only upgrade a 7oz to an 8oz but would also overcome the problem I beleive 80% of slide sinkers have and that is to assist with casting all the weight is at the wrong end of the sinker when you want the grapnels to dig in.
I make my booms out of a single strand of 2mm s/s spring wire so slipping a 1oz barrel sinker on was no trouble. It all looked a little odd but the other day I hauled 1 out and cast it into an area where I normally struggle to get a 9oz to hold and it gripped just fine.
I think the barrel sinker is key as it is long a allows the weight to be spread further back on the boom. This is a little like they do with boat anchors where you add a peice of chain to the anchor before the rope. The extra weight on the boom does the same as the chain on the anchor. It keeps the boom down while the angle of your line is trying to pull it up, this allows the points of the grapnels to dig in better.
Here is a pic of a 7oz with a 1oz barrel sinker added. I also do a 9oz with a 1oz barrel sinker and I think if that doesn't hold it's hometime
