RTI RTI Mora just keeps getting better.

maxtrouble said:

@JoePolanco - Very nice results. What chronograph are you using?

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This is the Labradar LX. It's awesome. Built like a tank, automatically calculates BC, never misses a shot, and frequently updated. I've had it since October and it's leaps and bounds better than any of the others I've tried. ( FX pocket, FX true bal, Garmin and the Velociradar )

More RTI MORA stuff. If you guys get bored with this, let me know, I'll stop.

Thursday at the range with the .25 caliber Mora shooting 1026.7 fps

Today after 150 frustrating shots with the AEA 33.9 pellets which apparently my gun does not like.
Over the course of the last week I've shot over 800 of the 33.9 pellets in both JSB and AEA brands from speeds of 860 all the way through 990 fps. I've have no luck at getting them to group or even land consistently at any speed. Very disappointed with the AEA 33 grain pellets in this gun. Fortunately, my Skout Epoch absolutely loves them.

Anyway, I switched to 29.5s in the last few minutes of this mornings session, and decided to try 1030fps which had been recommended to me by another shooter. (sorry, I don't remember who it was). I bumped the reg up ever so slightly and hit 1030 instantly. I then proceeded to grouped 5 shots in a fingernail size hole (about 1/2 MOA at 100yds) and decided to shoot a target.

This was the immediate result.

MACTEN said:

Did you start with the valve all the way open? Curious what the start fps was prior to tweaking. Those Jts are screaming! Very nice shooting Joe.

Oh, and what's the reg set to? I've been fine tuning mine (600 .25) for 38 grain .250 Zan's but a buddy is doing well with those same JTS pellets you are shooting and 36 grain H&N .25's

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Im strictly a bench shooter so slugs are not anything I've experimented with. As for pellets, my tune began at 110 bar on the reg with the valve adjuster 1/4 turn from fully closed. Ideally I was aiming for 970 fps with the 29.5 AEA pellets. The results were excellent but even so someone recommended I try 1030 fps. Well that speed too is yielded excellent results.

My tuning philosophy for pellets is pretty much the exact inverse of what most guys use to tune slugs. I believe in a short sharp blast of air to get the pellet out of the barrel with the absolute minimum amount of trailing air. This minimizes the vortices that cause drag and pull the pellet offline. So what does that mean? It means a higher reg pressure and a very short dwell time for the valve.