Texan 257 Loading Question

My new Texan 257 caliber arrived today. Clean the barrel Mounted a scope and touched off a few rounds. I think this will prove to be a very accurate gun from my initial impressions. Here's my question. I am using 70 grain from the 420 mold. I spoke with Matt at R&L airguns and he suggested they be sized to .25 65. I noticed that when I lay them on the loading tray they do not want to be pushed very far into the chamber. When I force them there is still about 1/3 of the bullet that is visible. They did seem to shoot very well. I watched a YouTube video of a guy loading a .457 and he was just putting them on the loading tray and closing the chamber and shooting. This is my very first experience with a texting so any help would be appreciated. Thanks Ray
 
If it's accurate great but if Matt knows lands ID to the ten thousandths is .2565 then just a smizzle of lead is being shaved off At .257 ( or bigger) 

As we recently saw pellets on a 30K chemist scale measured to the 6th( ten hundred thousandths of a grain) decimal, out of 500, only THREE weighed stated weight on tin. 497 were off, heavy or light.

Your mold will be much more consistent but even you using a razor to cut off extra, round back with 600 grit are going to get weight variances. It simply doesn't matter much to paper or dead vermin or game. The only thing I'd consider if not taking Matt's .5ten thousandths advice is clean barrel more often, or.... Run JB bore paste through it on a snug patch for 30 passes than clean. Try it. Did it improve? In accuracy or loading tension? Hey, How many shots that .257 Tex give? I wanted a 22lb BR .257 but it gave like 3-4 consistent, 7 total. Big regulators can be made but you loose volume anyway. Air Force is onto a good thing with direct flow from behind. Kral and Hatsan finally did what I said I would if had machinery & money 10 years ago. 500cc 4500 C.F. bottle front & back. Or Ernest's old Franken Rapid. 2 500cc 4500's side by side up front. So how many shots within a 40fos spread from factory .257?