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Thread: I don't believe a TP smaller than 3.0mm ever works in a 12FP springer....

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  1. 21-03-2021, 11:33 AM #1
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    Quote Originally Posted by TonyL View Post
    Yes, Pete, I also think it's brilliant that we have so many people like Jon who will put the work in, experiment etc. and then share their findings with all and sundry. Like he says, anything tighter than 3mm probably creates too much choking effect on most layouts, but I only base that comment on what I've learned from these many great people who are willing to share their knowledge.
    Indeed Tone, I've been looking at long drills now starting at 3mm and working up in increments, may have to purchase some and have a play one day, I suppose finding out what size TP my Mercs and Supersport have already would help.

    Pete
    Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
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  2. 21-03-2021, 11:37 AM #2
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    Quote Originally Posted by look no hands View Post
    Indeed Tone, I've been looking at long drills now starting at 3mm and working up in increments, may have to purchase some and have a play one day, I suppose finding out what size TP my Mercs and Supersport have already would help.

    Pete
    a taper reamer makes things a bit easier.. just go from both sides
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.
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  3. 21-03-2021, 07:28 PM #3
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    Quote Originally Posted by Shed tuner View Post
    a taper reamer makes things a bit easier.. just go from both sides
    How do you us one inside the cylinder?

    Pete
    Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
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  4. 21-03-2021, 07:40 PM #4
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    Quote Originally Posted by look no hands View Post
    How do you us one inside the cylinder?

    Pete
    I have an extension socket with a holder for it. Plenty long enough
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.
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  5. 21-03-2021, 07:54 PM #5
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    Quote Originally Posted by Shed tuner View Post
    I have an extension socket with a holder for it. Plenty long enough
    Oh you lucky lucky bas****

    Pete
    Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
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  6. 18-04-2021, 03:24 PM #6
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    Well I've been playing around with one of my BSA Challengers today and thought I'd measure the transfer port whilst the barrel was off, well the length is 13mm and diameter is 3.3mm, I bought some extra long drills the other day ranging from 3mm to 4mm., so it would be interesting to see how efficient those measurements are for that rifle.

    Pete
    Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
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  7. 18-04-2021, 07:05 PM #7
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    No mention of calibre...does it not influence the optimum size of TP required?
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