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17 aguila ruger 10 22 conversion

bustinstainless
does anyone know about the 17 aguila conversion for the ruger 10 22?
is it the same as 17m2
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Comments

7 comments

Date Votes
  • Tailgunner1954
    The Aguila is NOT the same as the 17HM2
    Look at the cartridges in the 3rd row up, #5 is the Aguila, #6 is the H2, #7 is the HRM
    Cartridges016.jpg
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  • nononsense
    bustinstainless,

    No changes except for the barrel.

    Keep a factory strength hammer strut spring in your 10/22 if you plan on rebarreling it to 17 Aguila. The extra force required for the bolt to run the hammer back to the cocked position offers adequate resistance to the brisk back thrust of the bolt and keeps velocities uniform.

    Comparison:

    17aguilarf17hm2.jpg

    Best.

    ADDED:

    .17 HM2

    17 gr (1.1 g) V-Max 2,100 ft/s (640 m/s) 166 ft?lbf (225 J)

    .17 Aguila

    20 gr (1.3 g) SP 1,850 ft/s (560 m/s) 152 ft?lbf (206 J)

    Best.
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  • bustinstainless
    thanks for your input it is very much appreciated
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  • clays
    nononsense, is partially correct. I have done this conversion
    to several rifles and first tryed it without changing to the
    heavy bolt actuator. DO NOT DO IT without changing this part
    also. The 17 aguila actually developes more pressure than the
    17M2 and therefore requires additional weight to the bolt to
    prevent damage to the receiver. Voice of experience.
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  • nononsense
    clays,

    While I am certainly not going to lay claim to being the world's ranking expert on rimfires, I will state that there may be some confusion.

    "Use of the Stinger case in developing the .17 HM2 enabled engineers at Hornady to safely push a 17-grain bullet beyond 2000 fps from a 24-inch barrel without exceeding the maximum chamber pressure level of the .22 LR. The velocity they achieved is 150 to 200 fps faster than the .17 Aguila, which is on the standard-length .22 LR case. Overall length of the .17 HM2 is the same as for the .22 LR, and that along with the fact that it works fine in most magazines originally designed for the .22 LR helped to pave the way for manufacturers of repeating rifles to quickly adopt the new chambering."

    It is NOT the chamber pressure that is the problem but rather the Peak operating pressure. The HM2 has demonstrated this while the Aquila has not.

    I talked to Aguila, CCI and Hornady, with all of them agreeing that the 'heavy bolt' was a good idea for the HM2 but nary a word on the smaller Aguila. This is not to say that there aren't conditions that could exist to exacerbate a bolt thrust problem so I favor erring on the side of safety in that if signs of battering are obvious then change the bolt. It's as simple as that.

    Best.
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  • tsr1965
    Is the Aguila using the same bullet weight or is it heavier? Just curious, not questioning anyones post.
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  • clays
    The Aguila is a .172 dia 20grn bullet
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