Grain weight. - Spey Pages
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post #1 of 21 (permalink) Old 04-10-2016, 04:53 AM Thread Starter
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Grain weight.

Hello All,

a quick question for you. My T&T DNA XF 12'6" 7wt calls for a 260 scandi. I've casted one and it is wonderful. it is a loaner/demo from my local shop. I want to buy an Airflo scandi but it doesnt come in 260 it comes in 250 grain. Does 10 grains make a difference?? or can i get a 250 and throw it as well as the 260??

Thanks for the help

~S
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post #2 of 21 (permalink) Old 04-10-2016, 05:22 AM
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Hello All,

a quick question for you. My T&T DNA XF 12'6" 7wt calls for a 260 scandi. I've casted one and it is wonderful. it is a loaner/demo from my local shop. I want to buy an Airflo scandi but it doesnt come in 260 it comes in 250 grain. Does 10 grains make a difference?? or can i get a 250 and throw it as well as the 260??

Thanks for the help

~S
The Airflo Spey line recommendation chart doesn't currently list this rod.

The Rio Spey line recommendation chart does list this rod specifically.

see - w w w dot rioproducts.com/RIO-Spey-Line-Recs.pdf

Under 'Scandi' type heads/lines, Rio recommends for this rod as follows:

(where 'A' is the rating/recommendation for experienced casters, 'B' is the rating recommendation for less experienced casters)

Rio Scandi - A: 480; B: 540.

Rio Scandi short versi-tip - A: #7; B: #8

Rio Scandi versi-tip - A: #7; B: #8

I wonder where you found the recommendation for a 7wt Spey DH rod as 260 grains??

*Not exactly the same T&T rod, but on the Bearsden.com webpage for T&T DNA rods, the 7wt 13'0" rod shows

Thomas & Thomas DNA 1307-4
$1,055.00
Length: 13'0"
Line: 7wt 450-525 gr.
Pieces: 4

One last point; if 10 grains REALLY mattered, you could be sure that line manufacturers would be selling these in 10 grain increments (not that there would be any commercial considerations that anglers would need to stock up on an even greater number of lines )


Mike
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post #3 of 21 (permalink) Old 04-10-2016, 06:15 AM Thread Starter
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Thank you Mike,
I meant 460 not 260. I got it from the Rio line selector app. I didnt think 10 grains really made a difference, just wanted to check with some other people with more experience than me.
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post #4 of 21 (permalink) Old 04-10-2016, 06:26 AM
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Ahhh!!! That makes sense now! Phew!

& I would confirm that 10 grains here or there won't amount to a hill o' beans!

Good fishing


Mike
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post #5 of 21 (permalink) Old 04-10-2016, 08:16 AM
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Lines and shooting heads have quite big weight tolerances which often are much more than 10gr and sometimes people who put lines to spools and boxes make mistakes so it is very good to have a scale.

Esa
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post #6 of 21 (permalink) Old 04-10-2016, 08:33 AM
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Lines and shooting heads have quite big weight tolerances which often are much more than 10gr and sometimes people who put lines to spools and boxes make mistakes so it is very good to have a scale.

Esa
Industry standard acceptable 'tolerances' for fly lines is of the order of +/- 5%, which means that it is "acceptable" (to the manufacturing and selling side of the fishing industry) to have, within the packaging marked as '500 grain line/head' to have a line/head which weighs between 476 to 524 grains.

Whilst most lines/heads will weigh much closer to the denoted 500 grains than this 48 grains range of tolerance, it is still accepted that some lines/heads which the angler buys maybe up to 5% more or less than the 500 grain 'ideal'.


Mike

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post #7 of 21 (permalink) Old 04-10-2016, 09:40 AM
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Id say you are spot on lucky to be only 10gr off in the rating! With a different line you are probably going to feel that difference in taper more in that case. You may like how it casts even better. It is simply not an issue as the others have said - even if you weren't within the margin or error already. In the end the education you get from casting two such slightly different heads on the same rod will be golden!
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post #8 of 21 (permalink) Old 04-10-2016, 01:23 PM
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if you live close to a shop and can go in - they will often take lines out and you can actually weight them - I have done this before at Kiene's!! But agree 10 grains will have little impact - if you still have access to the line you liked - try weighing it and then try to match
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post #9 of 21 (permalink) Old 04-10-2016, 02:56 PM Thread Starter
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Awesome everyone! Thank you for the Info. I do have access to a scale and will weigh the line when I go into
The shop later today.

Sal
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post #10 of 21 (permalink) Old 04-10-2016, 11:12 PM
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It might be good for you to know that not all lines of the same weight will feel or cast the same. I'm not sure what 460grn line you used, but if it wasn't the same head as the Airflow 450 you are getting there is a good chance it will feel different. Rear taper, as well as weight distribution etc can all make a head feel and act differently. Just thought you might find this valuable just in case you buy a different head of the near the same weight and it doesn't quite feel the same to you. So sure 10grns probably doesn't matter but changing heads even in the same weight sure will.
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post #11 of 21 (permalink) Old 04-11-2016, 04:16 PM
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10 grains

I agree completely with Thunderbolt. Line tapers can very greatly. I have an older Vision Ace Scandi head l love casting on my 12' 7wt DHer. I've measured it and it weighs 446grains, which is pretty close to its manufacturing rated labelling of 29 grams (approx. 447.5 grains) on its box. I have cast its equivalent in Airflo Scandi of 450grains. While both cast on the rod, they feel and load completely different. I have taken both lines out running them side by side in my hand. The front and rear tapers very in length and weight as well as the overall line head taper design. It should be noted that the Vision is 35' and the Airflo 33' in length. I much prefer the Vision, it turns over and lays out way more smoothly for me, which probably relates to my particular casting stroke mechanics.

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post #12 of 21 (permalink) Old 04-11-2016, 06:02 PM
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Measuring front and rear halves weights of the head reveals quite well how a Spey line/shooting head behaves.

Esa
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post #13 of 21 (permalink) Old 04-15-2016, 09:37 PM
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I received 2 450 airflo skagits in mail today. One was 455 on scale, the other 470 on scale. Both lines in perfect shape. C'mon Airflo, tighten you specs!
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post #14 of 21 (permalink) Old 04-16-2016, 10:41 AM
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Not uncommon

Quote:
Originally Posted by DrBob View Post
I received 2 450 airflo skagits in mail today. One was 455 on scale, the other 470 on scale. Both lines in perfect shape. C'mon Airflo, tighten you specs!
That's no big deal.
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post #15 of 21 (permalink) Old 04-16-2016, 11:50 AM
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Question if it is NO Big Deal

Why do manufacturers hold themselves accountable to single grain

weight?

See Example

Currently

Company X Skagit Line 580 gr

Why not

Company X Skagit Line 570-595 gr


Would not all be happy because all got what was expected???

I am not a rocket scientist by any means but what we forgot in today's society is the importance of common sense and do not assume everyone is aware of the inability to consistently replicate a line weight in gr in today's current manufacturing environment

Food for thought

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That's no big deal.

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