FX Maverick .30 Sniper Velocity

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So this is the answer I got from FX.

You can install a heavier hammer or a longer hammer spring. Just note that if you do
this, be careful not to exceed the reg2 pressure with the power of the hammer spring
tension as you will gain overall power, lose overall adjustability, and run the risk of
caving in the inside of the action which is not covered under warranty. If you are okay
with this then the longer spring will allow you to exceed the 135 BAR pressure
possibly up to 145 BAR.


Reading that I sent a reply questioning why and explaining that in Ernest Rowe’s Mater Class power tune video of the Maverick he has his regs set at 180 and 155. Still waiting for a reply to why I cannot get anywhere near the 116 FPE as advertised.

So, what I tried was this as I figured I would proceed cautiously after reading their email. I have a FX Impact power kit. In that kit are two hammer weights. They measure .060 thick ( 1.6mm ). Adding one to the 13gr hammer weight increased the weight to 14gr and at the same time added .060 of spring preload. What it did was allow me to get the reg to 150 bar instead of the 135 I was unable to exceed before the addition of the weight. It also got me to +100 FPE that I was shooting for. Remember I was only able to get 44.75gr pellets to about 940-45 fps before and the 65.5 slugs to about 800fps. Here is where I am at now with the 150bar reg and 14 gr hammer and I am happy with this. Except for the 44.75 these are all NSA slugs.

Thanks everyone for your help and I hope my journey will help others.

730D28DD-8AA6-41A7-8915-7859091A7B95.1643653003.jpeg

 
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I'm curious what they mean by "caving the inside of the action"? It's like they're talking out of both sides of their mouth. "Hey check out this gun we sell that can do 116 fpe in .30. Also, tuning it to make that power can void your warranty". I call BS, lol. Don't get me wrong, I love my Maverick, but FX needs to get their story straight. I'd like to hear their response as to why some Mavericks come with a 52mm spring, and some come with a 56mm spring.

I think you'll be just fine putting the longer spring in there and running the regs higher as Ernest suggested to make more power. That whole bit about losing adjustment range with the longer spring is not really an issue, unless you're trying to run a super low power tune. The other benefit to the longer spring is you have a lot more head room on the hammer spring adjustment. I've been kicking the @#$% out of my gun with the Huma heavy spring and crazy high regulator settings(Huma). Your gun should be able to do 110-115 fpe without much fuss in .30, and I think it will be perfectly reliable in that power range. One of my favorite general tunes for target/hunting is the NSA 54.5 around 950 fps, I see no reason why your gun shouldn't be able to do that safely. Happy shooting!
 
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Seems like it is just a matter of who you talk to at FX I asked them about the new bottle valve for 300 bar application they told me they were all the same and you shouldn't run your gun at 300 bar I then asked the question why did they upgrade the 480 bottle to working pressure of 300 bar and change gauges out didn't really get a answer so I'm working on my friends m3 and I dig out the manual on the side of the gun it says max pressure of 250 bar In the manual under pressurization it is printed max pressure of 300 bar but follow the working pressure on your bottle do basically I got filled full of BS according to what is printed in the manual 
 
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When I started this trek to increase my velocity I checked my manual and there is no information on a maximum reg pressure for either reg. I based everything off of the masterclass videos that Ernest does for FX. Why wouldn’t someone set their regs to 200 and 170 there is no information to the contrary it only says to keep 30-50 bar between them.
 
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Mine is back to stock configuration with my plenum reg at 150,500mm barrel and short hammer spring it is shooting 44.75gr at 885fps. Your rear reg at 175 is a little high for the gun. What you need to do is make sure your hammer spring is 56mm long and your hammer weight is at least 13 grams.I detuned mine after I figured out what it needed to get the higher velocities and I know the gun had much more in it than what I tuned it up to.
 
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18.13 I agree I was getting it with the 700mm barrel. Going from the 700mm to the 500mm barrel at the same settings I lost about 110 fps.

Larry1956. : my power wheel is on 7. If you have to shoot yours on a lower number than 7 to get higher velocity then your gun is not adjusted properly. Look on YouTube for the Ernst Rowe Master class videos on how to tune the Maverick for top power.

Also: FX states their power figures are with the “ Slug power kit”. The .30 caliber already has it installed the power kit is for the lesser calibers. You can install a dual transfer port and pin probe for more velocity but it did not do much for mine when I tried it but I never ran my rear regulator above 150 bar yet.

If you adjust your gun like the master class videos you will get all it has stock out of it. Like 18.13 said to get more you will need to modify it.
 
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I bought this slug power kit, and I used the heavier hammer out of it. Here is a photo of the stock hammer and the heavier hammer in the slug power kit. This was in my Maverick VP .30 cal, and I did tweak the adjustment spring a bit.

20220310_205900.1650866119.jpg


I was able to set my regs at 155/125 and that gave me 930 fps with FX Hybrid Slugs, Hades and Exact 44.75 gr, and I get 880 fps with NSA 54.5 gr slugs. I have very flat velocity with these settings for about 32 shots with the 400cc VP bottle.

I'm certain I could tweak to a hotter velocity, but I'm pleased with this tune.


 
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