Tuning .45 909 new owner

[rcorwin3]

Hello all,

I just purchased a used .45 cal. 909 as I wanted a good looking big bore.

The questions I have are is there any need to tune or modify to get the best out of it and what type of scope that won't get knocked out of true because of the recoil? What type of o-rings should I get and are there assortment kits ( different sizes) that I can get for my air rifles. I have some general plumbing kits in my hands. Are they good enough for the pressures that are involved?

Thank you in advance for your help.

rik

 

[ScottEnglish]

Will Piatt at Saddle Mountain Gunsmith.

 

[rcorwin3]

Thank you for the information Scott. I just looked at the site and it seems pretty reasonable for the tune up.

Once again many thanks and have a better day!

rik

 

[John "spysir" Blount]

What's "best"? Want 5 even shots per fill you'll need to tune it down. Want all the power it will make, tune it. 

Or just learn it and use it as is, not a thing wrong with that (depending on your uses/goal).

Ace hardware or such o-rings are just fine and there are only 1 or 2 sizes needed -depending on which model you have.

VERY simple design, easy to work on. The power limiting issue is the restriction the receiver/barrel attachment, a home hobbyist will not be able to overcome.

Switching to a delrin valve stem is a great idea then just slot the sides of the valve to allow better airflow. That will get you an extra 100fps w/roundball. And likely give you 2 good shots at 200 yards.

The the twin tube model and single tube model are the same basic design.

John

 

[rcorwin3]

John,

Thank you sir that is some good information. I have some leftover delrin that I can machine to what I need. Will definitely work on over the next few months to prepare for hunting season.

Once again John many thanks.

rik

 

[John "spysir" Blount]

Rik,

If you can machine you are in there! I'm sure everything will make sense to you. The one company modding these for (2x times the rifle price) maximum power is just doing the normal tricks, AND machining the receiver "block"/cover removing the stub the barrel slides over (THE airflow restriction in this design) and making a new ( ? , would know the word) that fit's the O.D. of the barrel allowing good flow.

Please keep us posted.

John

 

[Malsonb]

Sent mine to Will. Very happy with it. Once I found a good slug it liked, it is a beast. The barrel diameter differ on each riffle. 456 was what most recommend. I ended up with nsa 196 grain un .454. It would get 4 shots close to 800 fps.