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Dukemeister
PostPosted: Tue Jul 11, 2023 9:00 pm 
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tom_ke888 wrote:
I found that I have four batches of 4.52, none of the new tins measured head size is actually 4.52, skirt size varied too. The weight is also all over the place. It’s a wonder I can hit anything at all.
Only one old tin measured 4.52 but the weight is way over at 8.64gr.

Tom, how many pellets did you measure for each tin. I believe H is head and S is skirt size, correct?

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tom_ke888
PostPosted: Tue Jul 11, 2023 11:42 pm 
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I just sampled one or two per tin. Not very scientific.


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tom_ke888
PostPosted: Tue Jul 11, 2023 11:47 pm 
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Rob27 wrote:
How do you measure these tiny differences?
My skills are more rough carpentry vs. precision engineering and trying to measure the difference between 4.49mm and 4.52 sounds like an exercise in frustration.
Thanks,
Rob27
I just used my digital caliper measured carefully.


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FX Dreamline Classic
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tom_ke888
PostPosted: Tue Jul 11, 2023 11:48 pm 
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Dukemeister wrote:
tom_ke888 wrote:
I found that I have four batches of 4.52, none of the new tins measured head size is actually 4.52, skirt size varied too. The weight is also all over the place. It’s a wonder I can hit anything at all.
Only one old tin measured 4.52 but the weight is way over at 8.64gr.

Tom, how many pellets did you measure for each tin. I believe H is head and S is skirt size, correct?
H is head size, S is skirt size.


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AirArms TX200HC
AirArms S400F
Diana Outlaw
Feinwerkbau 300S
FX Dreamline Classic
Weihrauch HW100KT FSB
Weihrauch HW97KT
Weihrauch HW50S
Artemis M16
Artemis PP700
Weihrauch HW40
Beeman P17
Stoeger XP4
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TCooper
PostPosted: Tue Jul 11, 2023 11:51 pm 
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Thanks Tom. I hope the new batch is accurate for you.
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tom_ke888
PostPosted: Wed Jul 12, 2023 7:03 am 
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TCooper wrote:
Thanks Tom. I hope the new batch is accurate for you.
Thanks Todd, I think the shot to shot variations is caused mostly by me shaking than the difference in pellets. I think I will be alright.


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AirArms TX200HC
AirArms S400F
Diana Outlaw
Feinwerkbau 300S
FX Dreamline Classic
Weihrauch HW100KT FSB
Weihrauch HW97KT
Weihrauch HW50S
Artemis M16
Artemis PP700
Weihrauch HW40
Beeman P17
Stoeger XP4
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TCooper
PostPosted: Wed Jul 12, 2023 9:08 am 
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tom_ke888 wrote:
TCooper wrote:
Thanks Tom. I hope the new batch is accurate for you.
Thanks Todd, I think the shot to shot variations is caused mostly by me shaking than the difference in pellets. I think I will be alright.

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My cheapo unchoked Crosman barrels have a very strong preference for a true 4.52mm head size. They shoot great when the head engraves into rifling when pushing the pellet into the barrel. The pellet actually gives a little squeak noise when pushing in the head. My rifles don't like when the head is just riding on top of the lands, even though the skirt is engraving. Your high quality Lothar Walther bbl in the TX-200 would have a choked muzzle and possibly a slightly tighter bore as well. Much more forgiving. Excellent rifles!
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tom_ke888
PostPosted: Wed Jul 12, 2023 11:08 am 
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Yeah, you are probably right. Two of my main springers are TX200HC and HW97KT. Both liked the 4.52/4.51 JSB Exacts in 8.44gr. They seemed to be very tolerant. So, maybe that is why I can not tell the difference in slight variations in pellet spec’s.


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AirArms S400F
Diana Outlaw
Feinwerkbau 300S
FX Dreamline Classic
Weihrauch HW100KT FSB
Weihrauch HW97KT
Weihrauch HW50S
Artemis M16
Artemis PP700
Weihrauch HW40
Beeman P17
Stoeger XP4
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