A good place to start is an exploded veiw of the gun and parts.
See the link below
mod 55s is in .177 calibre and mod 60s is in .22 calibre apart from this they are the same rifle, it is also available in .25 calibre but not sure of the model number.
.177 is the more common calibre, so if availability is an issue, that may be something to take into consideration.
DO NOT DO THIS!!!!!!!!!!!! DANGER, DANGER, DANGER!!!!!!!!!!!!!!!! You are asking for trouble.
It all depends on the particular model. There are over 100 different models that shoot .177 cal BBs'
I'm a little perplexed, what is the caliber 4.57.177 are you trying to say 4.5 and .177. The Diana model 35 came in both .177 and .22 cal. It was made between 1965 and 1987
An air rifle could be made in that calibre. Benjamin made a model 242 and 247 in .177 and .22 calber from 1968-92 but not a model 243.
About two and a half hours. Take 177 and divide it by 70.
Walther gets my vote. --------------------- New Answer--------------------------------------------------------- The finest .177 calibre air rifles are Olympic Competition .177 air rifles. These will fall to the Feinwerkbau line of Olympic rifles. However these are not cheap. The average cost is around $2500. Next in line are rifles made by AirForce airguns. Benjamin PCP airguns, Webley & Scott PCP air guns, Daystate LTD airguns and a few other PCP (PreCharged Pneumatin) air gun companies. Crosman, Gamo and Avante make fine air guns and rifles but are not as accurate as the ones previously mentioned.
It will take 177 years to get to the sun. 177 years is 64,605 days to travel to the sun from Earth.
177 x 177 = 1772 = 31,329
Take away 100 and add one...
The Dianawerk / RWS target model 100 .177 cal was made between 1989-98. Its a very expensive rifle.