The following loads were found on the internet.
THESE ARE NOT TESTED - USE THEM AT YOUR OWN RISK

bullet ---------- powder in grains --------- velocity
525 ------------- 90.0 IMR 4064 ------------ 1750
600 ------------- 50.0 AA 5744 ------------- 1450
600 ------------- 55.0 AA 5744 ------------- 1540
680 ------------- 45.0 AA 5744 ------------- 1350


I also emailed Accurate Powders and asked them for load data for 505 Gibbs using 5744 powder.
This is what they sent me. THESE ARE NOT TESTED

bullet ---------- powder in grains --------- velocity
535 ------------- 55.0 AA 5744 ------------- 1600
535 ------------- 62.5 AA 5744 ------------- 1800
535 ------------- 70.0 AA 5744 ------------- 1900
600 ------------- 52.0 AA 5744 ------------- 1525
600 ------------- 58.5 AA 5744 ------------- 1650
680 ------------- 65.0 AA 5744 ------------- 1800


In looking for a mild whitetail deer load, the following loads were tested in my rifle - it has a 21" barrel.

bullet ---------- powder in grains --------- velocity
350 ------------- 55.0 IMR 4198 ------------ 1630 (short case)
350 ------------- 55.0 IMR 4198 ------------ 1590
525 ------------- 56.0 AA 4744 ------------- 1500
525 ------------- 60.0 AA 5744 ------------- 1600

First shots through my gun today. 24" bbl
105gr RE15, 535 TSX, 2247-2311 fps, recoil very manageable, cratered primers which really surprised me. Nickudu's data on the reloading page uses much more powder.

factory Norma 600 Woodleigh, 2138 fps, recoiled noticeably more, I would have to work into that recoil level. I wonder about powder type and recoil. In general, with a few other guns and loads I thinks think the faster powders kick less given the same velocity.

Hello Dan416,

Faster powders recoil less because generally you use use less powder for a given velocity, than slower powders. The powder weight is a factor in recoil.

I use this site's "recoil calculator" to estimate and determine what recoil will be.

http://www.shooterscalculator....ecoil-calculator.php

Just a word of caution. I have noticed erratic ignition for loads less than 128gn of Powder in my 505 Gibbs. I would recommend using a filler if you are loading less than 128gn of powder.

I'm using 4 and 5 grains of polyester batting as a filler. It is very tight down on the powder when seating the bullet.

I use a 1" long piece of 5/8" dia foam backing rod. It only weighs .9 grains and works great.

I've been reading over on the double rifle forum about fillers. Backer rod seems to be a favorite. I am concerned about my cratered primers. I also see a product called Puff-Lon that looks interesting.

Buckstix, how does that rifle shoot? I looked at the rifle a few years ago and fell in love with it but I was afraid the overall size of the rifle would make it a hassle to shoot and handle.. Always have been a fan of the .505.

New sight and barrel band sling swivel. I trimmed off the original sling swivel to just about flush with the forearm to plug the hole. Now the gun looks much better.

Glad to see so much enthusiasm for the 505 love my CZ I picked up. Feeding it is a major investment I have more in ammo than rifle and I only bought 100 rounds lol

Ilike the 505gibbs and i saw one made for PETER KOKALIS of SOF magazine .But i have more experience with the 500 jeffery as Andre Flor aka jefferydenamrk a mmember of this forum brougth one here with 200 hundred ammo .We tested it in several game including buffalos hogs goats donkeys foxes etc very nice caliber .Im ver happy with this new interest in the 505gibbs and 500 jeffery .

Gunslinger, I am going to make a sizer die to bring .510-.512 cast gas check bullets down to 505 Gibbs usability. My bore is .5060-.5065 so my goal is to get them to .507". This should make the shooting more enjoyable on the wallet. .006" reduction on a 1/2" bullet should be easy. It seems some guys are making hard cast gas checked bullets do 2000-2100fps easily. (If what they post in the internet is true!)

OK you have my interest. I have a CZ anyone know how their bore diameters compare?

I have a first Gen CZ custom from triple river. I sent it back and they rebedded and worked the action and a few other things as the first ones did not work that great. I have the big NECG front sight base and elevated express sights. This limits the sight inserts to the .177 high very small dot front sights. I want a BIG highly visible front sight. This is a 50 yard DG low light tool after all not a long range plinker.

After mucho discussion with Harlan Satrang from triple river the gun is going back again free of charge to get a new FSB and sight setup. I wish they did this the first time. I will pay shipping and work done free. I think that is a fair deal and shows that they will stand behind gun. I also confirmed that there is a lifetime warranty on stock cracking. They are trying hard.

I need to find out if I go 3 position safety and some of the other AHR mods like on my Lott if it will mess with warranty.

I am planning a hunt around this rifle so I want it setup just the way I want it.

My last hunt I opted for the film time with the demo rifles and took them instead of mine and did not like the setup. Rifles are a very personal thing and I am particular. This Gibbs is almost perfect. Just needs a bit of tweaking.

I'll post a before and after if I can figure out how it's been a while.

Gunslinger, you will have to slug the bore or use Cerrosafe to find groove dia. I just got a proper reloading die tonight to make a sizer out of so I can order some cast bullets tomorrow.

Forgot to say I like a large front bead also. The Ruger front sight I just put on has a 1/16" bead - way too small. My 416 has a 1/8" and a wide English V which I like. Another modification to keep me busy.