Reply with quote #1
got a 40x this weekend with a fudd tuner & no idea how to adjust it,any help would be appreciated in where to start tuning
Reply with quote #2
I don't know about the Fudd Tuner, but with nine Remington 40XB's I may know something of them! I'd say throw the tuner away! The 40XB's that I have shoot like a house-a-fire! What caliber is it?
Reply with quote #3
it's a 22 lr
Reply with quote #4
I got this off RFC. I think it is assuming a Harrells tuner due to the mention of clicks. Start out with full turns and then when you find the best spot go to the smaller adjustments. I kinda sorta used this method yesterday with my first tuner which is also a Fudd. Due to some switchy winds I fired at least 5 rounds at each full turn.
I really didn't have enough ammo to do a proper test but the rifle did shoot better than ever. I contribute most of the improvement to finally getting the crown at the tightest spot in the choked section of the bbl. The tuner is just the final piece of the puzzle.
ADJUSTING YOUR TUNER “The Hopewell Method”
1. Set your tuner to “0” and fire two shots.
Turn tuner one complete revolution (25 clicks) and fire two shots, continue this until you reach “100”. You now have a 10 shot group, all shot at the same POA.
2. Repeat step one from “100” to “200”
3. Repeat Step one from “200” to “300”.
4. Repeat Step one from “300” to “400”
5. Repeat Step one from “400” to “500”. You now have five 10-shot groups.
One of the 10-shot groups will show the smallest vertical stringing. You should have used only 50 rounds so far.
Let's say that you find that the “200” to “300” group shows the least vertical stringing.
6. Starting at “200”, shoot 2 five shot groups. Shift to a different POA for each group.
7. Repeat at “225”, “250”, “275” and “300”
8. One of these settings will show a decrease in group size.
Example: “250” showed the smallest group.
9. Now, start at “245” and shoot a five shot group at 245, 247, 249, 251, 253 and 255.
You will locate the “sweet” spot of your rifle barrel.
10. If you have any doubts, start over at Step #6, and redo the testing.
Reply with quote #5
Don't throw your tuner away as they do help. There are a few competitions that don't allow them, but they are usually local matches. The ARA Nationals will be coming up Labor day weekend in St. Louis, probably about 150 shooters. You will be hard pressed to find a gun without a tuner. A few guns will shoot one lot number of a given brand as well as if they had a tuner, but a tuner will give you more options with lots. Take five shot groups for instance, measured center to center. If a gun shoots in the low threes (.325 or so) in might shoot high 2's with a tuner. Mid 2's without might shoot low 2's with. Doesn't sound like much but can mean several hundred points on an ARA target. One place I gave up on a tuner was my three position gun. At my medicare age adding weight to the end of my 16 pound rig induced tiring more quickly than I gained in accuracy. The hopewell method given is highly used. But if your gun has a tuner position already as received, you might record that. As once a tuner position is found it usually works for multiple lot numbers. Changing brands of ammo might only mean a few clicks. This will save on ammo testing. I just switched my bench guns from a good lot of Lapua Midas M to some Lapua Center X. It shoots the new ammo even better at the same tuner setting.