Hey GuysAnyone done some pellet testing on their new Dar 17 cal, I have to order some pellets,and really don't know where to start on a PCP 17 cal.I am hoping that I can make an inside pesting rifle for a max 25-30 yds for thinning those flying rats,and don't punch ANY holes in the alum/tin roofing material etc........ I am thinking a lite weight wadcutter pellets around 700-800 fps, should provide plenty of smack down etc........... Your thoughts and suggestions..........Tia,Don
Ok, here's a string I shot this morning using crosman 10.5 gr. In the chart I listed as 10.34gr but that wasn't correct. The main thing I noticed is I'm only getting 24 shots before it starts to fall off the reg. The reg seams to be set around 1400ish. This was at the stock setting. Anyone else with a 177 only getting 2mags worth. Doesn't seem right considering the size of air tube.
Quote from: Ed24 on December 06, 2020, 01:29:43 PMOk, here's a string I shot this morning using crosman 10.5 gr. In the chart I listed as 10.34gr but that wasn't correct. The main thing I noticed is I'm only getting 24 shots before it starts to fall off the reg. The reg seams to be set around 1400ish. This was at the stock setting. Anyone else with a 177 only getting 2mags worth. Doesn't seem right considering the size of air tube.It's probably operating way up on the velocity plateau. Too much hammer spring tension and it's wasting air. Try backing out the hammer spring adjuster until the velocity drops to about 874 - 892fps (95-97% of 920fps). I expect your shot count will increase dramatically and it will be much quieter as well.
Does anybody have a promo code that's valid right now? I went to buy a .22 and found that the promo code 2020 has expired.One more question: Is this rifle regulated? Is the dovetail scope rail metal or hard plastic? How accurate would this gun be at 30 or 40 yards? I never hunt with my guns. I just get some lead therapy by plinking and trying to get really good groupings on my targets.
Where would be a good place to purchase springs from? Would rather try that before I cut a notch in the back of my stock...
Quote from: Ed24 on December 06, 2020, 07:22:12 PMWhere would be a good place to purchase springs from? Would rather try that before I cut a notch in the back of my stock...McMaster Carr has a good selection. You'll have to pull the stock spring out and take some measurements. Either shorter or smaller wire diameter should yield better results for you.
A spring with the same OD or ID (depending on how it is stabilized in your application), that just has thinner wire will probably work. However, one of the tricks to prevent hammer bounce, is to set up a stiff spring so that when the hammer is in the forward rest state (after firing), that there is actually no preload on the spring. So, a softer spring with lots of preload may reduce velocity to where you want, but cause hammer bounce and use more air.A similar spring to what you have, with just a few coils less would be on my list to try. Or, even one with thicker wire, but a shorter overall length. The fact that you are unloading your spring so much, with very little velocity response, suggests your spring is long with thin wire, using a lot of preload.The effect of wire thickness on spring rate is dramatic. Going from .03 to .04" is a much larger than 33% change; all else being equal.I use McMaster a lot because their cataloging is very easy to use. For a $1 bag of springs, you may end up paying $8 for shipping... The flip side is that I get parts delivered within one day - very convenient. www.mcmaster.com/compression-springs/compression-springs-7/Amazon prime is cheaper, but finding the exact spring you want is a nightmare...Of course, there are many spring specialists that would work also. Someone might suggest one.
Ordered a couple different springs today and should arrive tomorrow. Will let everyone know what finally works. Was hoping I could use this rifle for a little slug gun but didn't shoot the 12gr NSA very well. At 40yrs was getting about a 6" group. It did do really good with some pellets and bet would be better if I can slow it down a bit.
Quote from: Ed24 on December 07, 2020, 06:10:31 PMOrdered a couple different springs today and should arrive tomorrow. Will let everyone know what finally works. Was hoping I could use this rifle for a little slug gun but didn't shoot the 12gr NSA very well. At 40yrs was getting about a 6" group. It did do really good with some pellets and bet would be better if I can slow it down a bit.Did you make sure your barrel was absolutely clean and lube your slugs? Seems I remember someone else on the forum having good luck with the 12.5's in there's.
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