PREFACE

I had one older LotharWalther .25 calibre airgunbarrel mounted on an FX-Typhoon with a modified 12 shoot magazine, It worked realy good but doens have a choke so it´s a little bit picky with the choice of amunition.

When i saw that Chambers Gunsmith had started to sell LotharWalther barrels in calibre .25 with polygonical rifling i was curious and wanted to try one out right away.

Would it be good shit or would it perform as the older type of LW barrels without choke ?

Firs i phoned Chambers and wanted to know a little bit about the LotharWalther polygonical barrels, They where wery helpful and answered all my questions.
As You might understand it ain´t easy helping people who speak and write rather than good :-)


I needed one PCP host to try it on and, I choosed the Hatsan AT44 .25 mostly becouse of the low price but also couse i wanted to see how hatsans AT44 valve did look like.


The Hatsan44 was equiped with a .25 barrel straight from the factory and many people got fine results with that barrel, acctually it works better than you would expect when comparing the price of the rifle with more expensive rifles.

The hatsan44 barrel is just 480 mm long and 14mm in diameter , the LotharWalther is 605mm long and 16mm in diameter, it is heavy !



CLICK picture to enlarge !



Changing to the new barrel was pretty straight forward, just mount the new barrel in the lathe and turn it down to about 11,05mm in diameter so that it fits perfectly in the breech, i didnt do any turning on the barrel outside the breech.
You can drill/mill the transferport directly into the barrel but i mostly make one barrel inlet/insert when mounting new barrels.

The LotharWalther .25 barrel is quite heavy so it was no alternative to have it free floating on the Hatsan AT44 , the breech on the Hatsan AT44 is realy not made for such a heavy barrel without using tha barrelsupport.

using barrelsupport on a PCP can, and will mostly, change tha way the barrel behaves when firing a shot, I wont dig any deeper into that and for a quick tryout of a new barrel it wont matter that much.



Ofcourse I had to enlarge the holes in the barrelsupport, they where about 14,5 millimeters with O-rings, I did a quick-n-dirty drilling them up to 16,05 millimeter without O-ring.

THE TRYOUT

First i tryed the rifle with HN Barracuda .25 31,14 Grain ammunition, works Ok but I also had some of the JSB Exact King .25 , compared to the HN Barracuda who has been arround a while Exact King is brand new, it only took about 10 shoots for me to see that the Exact King worked much better.

Exact King wights 25,4 Grains.



I´ve tried quite a lot of .25 ammunition before and came to the conclusion that HN FieldtargetTroophy and HN barracuda was working OK, all other types worked worser so i wont try out thoose old types now.

The hatsan AT44 was adjusted to give about 261 metres per second ( 856 feet per second ) with the 25,4 grain Exact King and this is what i got a quite calm day with some weak side wind comming in intervals.
The scope is one MTC Taipan 6-24x56IR , Low price and one of the better chinese made lowbudget scopes right now.


The distance was 50 metres ( 55 Yards )and i shot 4 shots on each targetboard, totaly i shot about 200 shots with Exact King this day but, theese results are representative for what is easily achieved with the LotharWalther .25 polygonical rifling barrel.





KLICK to enlarge !

Im quite pleased with the LotharWalther barrel, It shoot just fine with the JSB and I can recomend it to everyone that wants to get a new .25 barrel for their PCP, My next project will be exchanging my old LW barrel on my FX Typhoon with this newer type of barrel.



And remember ! DO collect the led You shoot when possible to do so, the led is poisonus for our environment and even if You own the land where You shoot, the led will spread with the groundwater / subsoilwater.

If You wold like to contact me for any reason, please drop a mail to lwhatsan*ATT*gmail dot com , or write a comment here and i will try to answer as good as i can. THNX !